Find your workspace ID

Learn how to find your Databricks workspace ID in the web UI as well as via a notebook command....

Cannot start Databricks workspace from Google Cloud console

Check to make sure your Databricks subscription is active and that you are using the correct Google account....

Failed to add user error due to email or username already existing with a different case

You should ensure casing for usernames is consistent across all accounts and providers in your system....

Cannot access Databricks secrets when using a "No isolation shared" cluster

You cannot use dbutils.secrets.get() when admin protection for No isolation shared clusters is enabled in your account....

DNS resolution fails for a newly created Databricks workspace

Users should wait for 10 minutes before re-creating a workspace with the same name....

Reactivate a user that has been disabled with AAD at the Account and Workspace level

Using a default account API call, activate the user first at the account level, then the workspace level....

Slack alarm notifications test fails with “invalid_token”

Verify that the notification destination URL is still active, check the expiration status of the destination token, or create a new webhook in the destination. ...

Unable to manage pipeline permissions despite being pipeline owner or workspace admin

Enable the Clusters, Pools, Jobs Access Control workspace configuration....

Querying system.access.audit table not returning expected records

Query the system.access.audit table for the "filesystem" service and the "volumeDelete" action to track when entire volumes are deleted instead, or use external tools to track at file level....

Reactivate inactive users at the account level using OAuth token for non-SCIM scenarios

Create a service principal and use an OAuth token to activate users via an API call without having to use a SCIM token....

DIRECTORY_PROTECTED error when deleting a user’s home folder

Remove the user from the workspace, then you can delete the home folder....

Activate or deactivate a user in the account console or workspace using the API

Create a service principal and use the Update user details account API endpoint....

Cannot upload CSV or SH file types in workspace UI

Set enableWorkspaceFilesystem and enableFilesInWorkspace to true....

Setup cross account bucket access in Google Cloud

Use service accounts to grant access to storage buckets in another account....

Job fails with input/output error when displaying a data frame

Check your NSG and port settings. ...

Connection refused error when trying to connect to an external service from Databricks

Check your DNS resolution and port connectivity, report to your internal networking team, and then contact Databricks if the issue still persists....

Apache Spark driver failing with unexpected stop and restart message

Reduce the size of the objects being collected or processed in parallel. ...

Configure Simba ODBC driver with a proxy in Windows

How to configure the Simba ODBC driver to connect through a proxy server when using Windows....

“SSL_connect: certificate verify failed” error when trying to connect to Databricks from Tableau

Manually add intermediate certificates to the root certificates file in order to be recognized by the ODBC driver....

Error embedding AI/BI dashboard in Google Sites

You may need to whitelist additional Google domains based on your embed type....

Install a private PyPI repo

How to install libraries from private PyPI repositories....

Cannot apply updated cluster policy

When performing an update to an existing cluster policy, the update does not apply unless you remove and re-add the policy....

Cluster Apache Spark configuration not applied

Values set in your cluster's Spark configuration are not applying correctly....

Admin user cannot restart cluster to run job

Learn how to re-grant privileges to Databricks Admin users....

Cluster fails to start with dummy does not exist error

Cluster is not starting due to a `dummy does not exist` Apache Spark error message....

Cluster slowdown due to Ganglia metrics filling root partition

Resolve cluster slowdowns due to a Ganglia metric data explosion filling the root partition....

Failed to create cluster with invalid tag value

Cluster creation fails if optional tag values do not conform to cloud vendor requirements....

Set executor log level

Learn how to set the log levels on Databricks executors....

Auto termination is disabled when starting a job cluster

Auto termination policies are not supported on job clusters....

How to overwrite log4j configurations on Databricks clusters

Learn how to overwrite log4j configurations on Databricks clusters....

Apache Spark executor memory allocation

Understand how Spark executor memory allocation works in a Databricks cluster....

Configure a cluster to use a custom NTP server

Configure your clusters to use a custom NTP server (public or private) instead of using the default server....

Enable GCM cipher suites

Enable AES-GCM encryption (GCM cipher suites) for use with SSL connections to other clusters. Resolve javax.net.ssl.SSLHandshakeException error....

Enable retries in init script

Add a retry function to your init script....

Cannot set a custom PYTHONPATH

Setting a custom PYTHONPATH in an init script or in DCS is not supported....

Run a custom Databricks Runtime on your cluster

Configure your cluster to run a custom Databricks Runtime image via the UI or API....

Cluster init script fails with mirror sync in progress error

If the mirror you are using is not in sync with the main repository, apt-get update returns a Mirror sync in progress error....

Pin cluster configurations using the API

Pin up to 100 compute cluster configurations using the API....

Unpin cluster configurations using the API

Unpin compute cluster configurations using the API....

Apache Spark UI task logs intermittently return HTTP 500 error

If the Spark property spark.databricks.ui.logViewingEnabled is set to false, you cannot view task logs in the Spark UI....

Disable cluster-scoped init scripts on DBFS

Set a cluster policy to prevent users from creating clusters that load cluster-scoped init scripts from DBFS....

Cluster-named and cluster-scoped init script migration notebook

Easily migrate your cluster-named and cluster-scoped init scripts to cluster-scoped init scripts stored as workspace files....

Cluster fails with Fatal uncaught exception error. Failed to bind.

If other software uses port 6062, it can conflict with the IPython kernel REPL and prevent the driver node from starting....

Log delivery feature not generating log4j logs for executor folders

Log delivery only generates a log file for the driver folder. This is by design....

Use a cluster policy to disable Photon

You can use cluster policies to prevent users from creating clusters with Photon enabled....

DBFS init script detection notebook

Scan your workspace for init scripts on DBFS....

Workspace is not UC enabled

Troubleshooting errors related to workspace not being UC enabled...

Migration guidance for init scripts on DBFS

Init scripts on DBFS are end-of-life. You should migrate them to cloud storage, Unity Catalog volumes, or workspace files....

Databricks spark-submit jobs appear to “hang” and clusters do not auto-terminate

Embed system.exit code in your application to shutdown the Java virtual machine with exit code 0....

Apache Spark is configured to suppress INFO statements but they overwhelm logs anyway

Modify your log4j2 configuration file directly within the Databricks environment. ...

Jobs fail with error: There are already 1000 active runs (limit: 1000).

Identify and cancel job runs causing the issue, then schedule future job runs farther apart than a few minutes. ...

Cluster fails with a DRIVER_EVICTION error

Ensure that the driver instances are not running on preemptive nodes....

Init script stored on a volume fails to execute on cluster start

Init scripts created on Windows systems and uploaded to Unity Catalog volumes have CRLF as a newline which needs to be converted to LF before the cluster can process it. ...

Databricks API last_activity_time attribute shows incorrect timestamp

Use the cluster auto-termination feature to manage cluster termination based on inactivity....

BROADCAST_VARIABLE_NOT_LOADED or JVM_ATTRIBUTE_NOT_SUPPORTED errors when using broadcast variables in a shared access mode cluster

Use a single-user cluster or pass a variable into a function as a state instead. ...

404 error when installing krb5-user module

Manually remove the var directory path to refresh the cached data. ...

Cluster startup failure while running proxy-configured init script with other init scripts

Modify the proxy init script to bypass local addresses....

Init scripts failing with unexpected end of file error

Remove the special characters from the init script....

Unable to access the hive_metastore schema

Ensure all clusters use the same Hive metastore version and Apache Spark configurations are set. ...

Job fails while installing ODBC Driver 18 for SQL Server using an init script

Add msodbcsql18 to the LD_LIBRARY_PATH then append LD_LIBRARY_PATH path to /etc/environment....

Error when trying to use Apache Spark’s Pyspark offset method on DataFrames with serverless compute

Use the limit method or the monotonically_increasing_id() function instead....

Jobs failing with schema conversion error: cannot convert Parquet type INT32 to Photon type long

Set spark.databricks.photon.scan.enabled to false....

Cannot access Apache SparkContext object using addPyFile

Leverage the addArtifact API instead....

Cluster fails to launch with a Bootstrap Timeout error

Verify allowlisting of necessary services and correct configuration of your VPC/VNet. ...

Cluster fails to launch with error, “user specified an invalid argument”

Change the cluster owner to an active user....

Job executions failing on clusters using Docker Container Services with MalformedInputException error

Specify the correct character encoding when reading the file and change the LANG settings. ...

Enabling Dynamic Allocation leads to NODES_LOST scenario

Enable Autoscaling when you create a Databricks cluster. ...

Jobs failing with BindException error after upgrading to Databricks Runtime 11.3 LTS or above

Change the ipywidgets default port to another available port....

Cluster fails to initialize after a Databricks Runtime upgrade

Check your init scripts and then your Apache Spark configurations....

Receiving “no space left on device error” message when attempting to use Apache Spark

Switch to a VM instance with attached local storage or increase the size of the VM boot disk....

Missing the audit log event of a cluster deletion

Pin your cluster and monitor usage....

Increased job execution time after migrating from all-purpose to job cluster

Increase the Hive client pool size in the job cluster configuration to match the previous all-purpose compute setting....

NODES_LOST error during cluster upsizing when Apache Spark dynamic allocation is enabled

Remove the spark.dynamicAllocation.enabled Spark config from the compute configuration....

Listing Hive metastore tables in Catalog Explorer failing with error getting schemas

Remove the Apache Spark configuration "spark.databricks.session.share true". ...

Change the minor version of Python in a cluster

Use an init script to install the desired versions of Python and pyenv....

Row value assignments not reflecting expected output in code that loops through temporary views

Avoid using temporary views with the same name when using loops in Spark Connect. ...

Unresolved column error when using Apache Spark Connect to run a query to create a temporary view

Use unique names for each temporary view. ...

scala.collection.immutable.HashMap$HashMap1 class leading to OOM error in driver

Change the webUI events location to RockDB....

Unable to attach init scripts to an interactive cluster

Ensure the cluster creator exists in the workspace and has the necessary group memberships....

How to restrict selection of specific Databricks runtimes in the compute creation UI

Implement a regular expression (regex) validation to ensure only certain selections are available....

Cannot select a compute policy for a DLT Pipeline

Ensure that you have permission to use the policy and are using the correct compute type....

How to restrict cluster creation to single-node only

Add a JSON configuration to your compute policy....

Workflows are failing with a 'Could not reach driver of the cluster' error

Use a larger driver instance or increase the REPL timeout....

Cannot create cluster: spark conf: 'spark.databricks.cluster.profile' is not allowed when choosing an access mode

Use the flag is_single_node to create single node compute....

FileNotFoundError when trying to use Android Development Bridge (ADB) command line tool on a cluster

Explicitly install the ADB tool on your cluster and set in the correct system path....

Spark UI is empty for the job clusters after termination

For non-Spark tasks the Spark UI should be empty....

502 error when trying to access the Spark UI

Enable Spark UI to store its data on disk instead of in memory....

Pulumi fails to deploy workflows in serverless mode

Update the Pulumi provider, check for configuration errors, and remove the job cluster definition from the payload....

Append to a DataFrame

Learn how to append to a DataFrame in Databricks....

How to improve performance with bucketing

Learn how to improve Databricks performance by using bucketing....

How to handle blob data contained in an XML file

Learn how to handle blob data contained in an XML file....

Simplify chained transformations

Learn how to simplify chained transformations on your DataFrame in Databricks....

Hive UDFs

Learn how to create and use a Hive UDF for Databricks....

Prevent duplicated columns when joining two DataFrames

Learn how to prevent duplicated columns when joining two DataFrames in Databricks....

Revoke all user privileges

Use a regex and a series of for loops to revoke all privileges for a single user....

How to handle corrupted Parquet files with different schema

Learn how to read Parquet files with a specific schema using Databricks....

No USAGE permission on database

User does not have USAGE permission on the database....

Nulls and empty strings in a partitioned column save as nulls

Learn why nulls and empty strings in a partitioned column save as nulls in Databricks....

Behavior of the randomSplit method

Learn about inconsistent behaviors when using the randomSplit method in Databricks....

Generate schema from case class

Learn how to generate a schema from a Scala case class....

How to specify skew hints in dataset and DataFrame-based join commands

Learn how to specify skew hints in Dataset and DataFrame-based join commands in Databricks....

How to update nested columns

Learn how to update nested columns in Databricks....

Incompatible schema in some files

Learn how to resolve incompatible schema in Parquet files with Databricks....

Unable to infer schema for ORC error

Apache Spark returns an error for ORC files if no schema is defined when reading from an empty directory or a base path with multiple subfolders....

User does not have permission SELECT on ANY File

Regular users cannot create tables without permission when access control is enabled....

Sync fails with [UPGRADE_NOT_SUPPORTED.HIVE_SERDE] Table is not eligible for upgrade from Hive Metastore to Unity Catalog

Convert your Hive SerDE tables to Delta format. ...

Parquet table counts not being reflected based on concurrent updates

Manually refresh the table in the notebook where the count was initially taken....

Empty string values convert to NULL values when saving a table as CSV or text-based file format

Use Delta as the target format for CSV files or other text-based data formats....

'CREATE OR REPLACE' SQL error in a Delta table

Correct the job schedule to ensure that only one query is executed at a time for a specific table....

Increased wait times between micro-batches in Auto Loader

Use file notification mode instead of the directory listing method....

Addressing performance issues with over-partitioned Delta tables

Implement liquid clustering for improved performance....

Count of corrupt_records returns zero in serverless

Collect records in an array and get the count of the array instead....

Error INVALID_TEMP_OBJ_REFERENCE when trying to create a view

Persist the temporary object to a location, then create your view....

Error when trying to parse XML in a shared mode cluster using the from_xml()function

Define an XML schema in a Data Definition Language (DDL) string first. ...

Error when trying to create a distributed Ray dataset using from_spark() function

Set spark.databricks.pyspark.dataFrameChunk.enabled to true....

INVALID_PARAMETER_VALUE error when trying to access a table or view with fine-grained access control

Upgrade the cluster's Databricks Runtime version to a version newer than 15.4 and use a single user access mode cluster....

Other users can see root (main) folder despite not having access permissions

Permanently delete items in the Trash and create separate folders for shared files or objects. ...

Execution error when trying to mount a storage account

Unmount the nested path and mount each storage account separately at distinct mount points....

Resolve Spark directory structure conflicts

Fixing java.lang.AssertionError: assertion failed: Conflicting directory structures detected...

Column values assigning in the order they are passed into Row() as arguments, not to the column name indicated

Create the DataFrame from a list of dictionaries or use the row.toDict() method....

Create tables on JSON datasets

Create tables on JSON datasets; requires SerDe JAR....

Optimize read performance from JDBC data sources

Learn how to optimize performance when reading from JDBC data sources in Databricks....

Failure to detect encoding in JSON

Learn how to resolve a failure to detect encoding of input JSON files when using BOM with Databricks....

Inconsistent timestamp results with JDBC applications

Timestamp records are inconsistent with JDBC applications when daylight saving time adjustments are made....

Kafka client terminated with OffsetOutOfRangeException

Kafka client is terminated with `OffsetOutOfRangeException` when trying to fetch messages...

Recursive references in Avro schema are not allowed

Apache Avro data sources cannot have recursive references in the schema when used with Spark....

SQL access control error when using Snowflake as a data source

Snowflake does not officially support schema as an option; you must use sfschema....

Column drift when reading multiple delimited files

Ensure that all files being processed together have the same schema....

NullPointerException when reading shapefiles from cloud storage on a Mosaic and GDAL enabled cluster

Zip the entire shapefile and upload to a Unity Catalog volume or DBFS storage. ...

MULTIPLE_XML_DATA_SOURCE error while working with XML data

Remove the external XML library from the cluster. ...

ALTER TABLE (drop partition) error in Unity Catalog external tables

For CSV, JSON, ORC, or data formats, use partition metadata logging. ...

“java.lang.IllegalStateException: Unexpected type: JSON” error when creating an external table from BigQuery

Upgrade your cluster to Databricks Runtime 14.0 or above. ...

Schema mismatch issue while reading parquet files

Fix the file schema or read the files separately. ...

Reading a CSV file in DROPMALFORMED still includes malformed rows in the result

...

Cannot see ingested data loaded from an external ORC table

Use the same Hive interface to ingest and read your Delta table. ...

Security Bulletin: Databricks JDBC Driver Vulnerability Advisory - [CVE-2024-49194]

Restart any long running clusters and update your JDBC driver to the latest version....

Error when creating a Delta table using the UI and external data in Delta format

Create the table using a notebook instead. ...

KeyProviderException error when trying to create an external table on an external schema with authentication at the notebook level

Set up authorization at the cluster configuration level instead....

Oracle Federation failing to find a data source

Upgrade compute runtime to 16.1 or use Pro SQL warehouse 2024.50...

Using LIKE statement causing slower performance in Lakehouse Federation query

Replace the LIKE statement in your query with filter options that can be passed as pushdown filters....

Total size of serialized results of tasks is larger than spark.driver.maxResultSize when using ODBC connection

Enable Cloud Fetch to retrieve larger datasets....

Multiple identical files being written to badRecordsPath instead of just one file when writing code to read a CSV file as a DataFrame

Use .option(“mode”, “PERMISSIVE”) instead....

Getting error when trying to connect to SFTP server from Databricks using passwordless authentication

Create an RSA authentication key to access a remote site from your Databricks account and preserve the private key....

FileReadException on DBFS mounted filesystem

Use dbutils.fs.refreshMounts() to refresh mount points before referencing a DBFS path in your Spark job....

Directory view in the workspace UI does not match the result obtained using the dbutils command

Use the file:/ prefix when accessing workspace files via dbutils....

Error while calling o430.mount and the executor has failed to refresh mounts

Use the refreshMounts command....

Download files from DBFS with the web browser

Make sure the DBFS File Browser is enabled if you want to download files from DBFS via the web....

Shell command %sh ls does not work on DBFS files or directories when using a shared cluster

Use a single access mode cluster, dbutils.fs.ls, or migrate to volumes....

UnsupportedOperationException error when trying to run queries interacting with event logs and multiple tables

Split queries into multiple notebook cells or use serverless compute....

Null column values display as NaN

Null column values correctly display as NaN in Databricks SQL....

Retrieve queries owned by a disabled user

How to retrieve queries owned by a disabled user in Databricks SQL....

Job timeout when connecting to a SQL endpoint over JDBC

Increase the SocketTimeout value in the JDBC connection URL to prevent thread requests from timing out....

Slowness when fetching results in Databricks SQL

Ensure that cloud fetch is enabled for best performance when using ODBC/JDBC to fetch results....

ZORDER results in "Hilbert indexing can only be used on 9 or fewer columns" error

OPTIMIZE ZORDER BY command has a hard limit of nine columns....

Cannot customize Apache Spark config in Databricks SQL warehouse

You can only configure a limited set of global Spark properties when using a SQL warehouse....

SQL warehouse launch fails to start with "PERMISSION_DENIED"

Ensure the necessary permissions are provided to the SQL warehouse owner...

Update the Databricks SQL warehouse owner

Learn how to use the API to transfer ownership of a SQL warehouse to a new owner...

Unable to use dynamic variable passing to create a function in Databricks SQL Warehouse

Use a Python UDF in a notebook to dynamically pass the table name as a variable, then access the function in a notebook or DBSQL. ...

Error running parameterized SQL queries in Databricks Connect with VS Code

Pass the SQL parameter in Databricks Connect using string interpolation. ...

spark.rpc.message.maxSize error after running DESCRIBE HISTORY in SQL warehouse

You must limit or prune the query when using DESCRIBE HISTORY on large history logs....

DeltaInvariantViolationException: Exceeds char/varchar type length limitation error when writing a Delta table

...

PySparkAssertionError: Received incorrect server side session identifier for request

You must detach and reattach to reset the state....

Error 'View/Table Does Not Exist' during model or query runtime in SQL Analytics

Use the command ALTER VIEW to update the view definition....

Unable to read external Hive Metastore tables on SQL warehouses

Manually set the appropriate Apache Spark configurations in your admin settings for SQL warehouses....

Using percentile() to work with large datasets causing memory issues or OOM errors

Use approx_percentile() instead. ...

Databricks SQL Warehouse query finish with cache is not populating ‘open in Spark UI’ option

When a query uses 100% of the cache, there are no corresponding Spark jobs or stages to display in Spark UI....

Jobs in SQL Warehouse returning 403 error

Modify the service account permissions, regenerate the token, and verify permissions are set....

Serverless query still running after canceling

Run the CANCEL command and configure a query timeout....

Photon ran out of memory while executing query

Ensure up-to-date statistics on all tables, simplify complex queries, or use Databricks Runtime 13.3 LTS or above. ...

‘Query timeout due to inactivity’ error when using the SQL execution API

Obtain a statement ID from the pending POST API call and make a GET API call instead. ...

ORC tables not recognized when processed in serverless warehouses

Recreate the ORC table as an Apache Spark format ORC table with "USING ORC" instead....

Filtering data with char(255) datatype column does not retrieve a result

Remove the blank space from the right side of the column, cast the column name as a string type, or upgrade to Databricks Runtime 15.4 LTS or above. ...

COPY INTO not loading new data to destination table

Use the ‘force’ = ‘true’ option in COPY_OPTIONS....

Changing ANSI mode inline doesn’t work when querying a view

Recreate the view with the ANSI mode you need, or use try_cast, try_add, or try_divide in query operations that are not ANSI compliant. ...

Using double quotes in a query causes a syntax error

Enable the doubleQuotedIdentifiers setting in your Spark configuration and set spark.sql.ansi.enabled to true....

New columns added to a table are not reflecting in a view

Rebuild the existing view or recreate the view using WITH SCHEMA EVOLUTION....

Not receiving emails from DBSQL alerts

Unblock noreply@databricks.com email from block list....

Error [DELTA_MERGE_INCOMPATIBLE_DECIMAL_TYPE] when performing a merge operation in Databricks Runtime 14.3 LTS or above

Set spark.sql.legacy.decimal.retainFractionDigitsOnTruncate to true or use the cast function to explicitly cast the columns to a specific decimal type....

Find long running queries in your SQL warehouse

Use the query history feature....

Creating a temporary view inside a function returns an [INVALID_TEMP_OBJ_REFERENCE] error

Make the function temporary so both the function and the temporary view have the same lifespan and session scope....

You want to declare temporary variables inside a function in Databricks SQL

Use CTEs to declare temporary variables....

Apache Spark session is null in DBConnect

A `sparkSession is null while trying to executeCollectResult` error message occurs when using DBConnect....

Failed to create process error with Databricks CLI in Windows

Databricks CLI may not work correctly in Windows if your Python path has a space in it....

GeoSpark undefined function error with DBConnect

Use GeoSpark code with a DBConnect session....

Get Apache Spark config in DBConnect

Use a REST API call and DBConnect to get the Apache Spark configuration for your cluster....

ProtoSerializer stack overflow error in DBConnect

A stack overflow error in DBConnect indicates that you need to allocate more memory on the local PC....

Use tcpdump to create pcap files

Analyze network traffic between nodes on a specific cluster by using tcpdump to create pcap files....

Terraform registry does not have a provider error

You cannot install the Databricks Terraform provider if the required_providers block is not defined in your modules....

Databricks Connect job fails after a Databricks Runtime update

Use the most recent version of Databricks Connect that matches your Databricks Runtime version to avoid an error....

Databricks-sql-python package fails with self-signed certificate errors and code _ssl.c:1006

Make sure your certificate is valid and updated....

Paths behave differently on Git folders and workspace folders

Git folders can reference the project root, while workspace folders reference the current working directory....

Content size error when trying to import or export a notebook

Reduce the size of your notebook so it is under 10MB....

Missing TRACE level Terraform log files to troubleshoot template issue

Learn how to enable Terraform log files....

Deploying Databricks Asset Bundles through a CICD pipeline fails with 403 error

Configure the .gitignore file in your GitLab repository to exclude unnecessary hidden directories from the Asset Bundle deployment....

Jobs deployed using Databricks Asset Bundles show RUNNING in the terminal but then seem to hang indefinitely

Use the --no-wait flag with the databricks bundle run command....

Databricks API call to GitHub failing with 403 Forbidden error

Disable the IP allow list in GitHub....

Jobs using Apache Spark 3.5.1 and the Elasticsearch Hadoop connector failing with MicroBatchExecution error

Contact the Elastic team for assistance, or use Databricks Runtime 13.3 LTS and below....

Connection timeout error when trying to connect to Snowflake from Databricks environments

Set up and run SnowCD to diagnose and troubleshoot....

Can’t find where to set email notifications for DAB jobs in the UI

Use YAML syntax to set the notifications....

“Cannot create grants” Terraform error when using multiple databricks_grants blocks for the same catalog

Use dynamic blocks within a single databricks_grants resource or use databricks_grant for ad-hoc permission assignment from Terraform. ...

Databricks Apps - Spark Context initialization fails with Java gateway error

Use the Databricks SQL Connector for Python to query tables in Databricks Apps....

Special characters appearing as junk characters when using the Simba Spark ODBC driver to access Databricks tables from external applications

Set the SIMBA_APP_ANSI_ENCODING environment variable to ISO-8859-15....

Compare two versions of a Delta table

Use time travel to compare two versions of a Delta table....

Delta Merge cannot resolve nested field

Delta Merge fails with a `Delta Merge cannot resolve 'field' due to data type mismatch` error message....

How Delta cache behaves on an autoscaling cluster

Learn how Delta cache behaves on an autoscaling cluster....

How to improve performance of Delta Lake MERGE INTO queries using partition pruning

Learn how to use partition pruning to improve the performance of Delta Lake MERGE INTO queries....

Best practices for dropping a managed Delta Lake table

Learn the best practices for dropping a managed Delta Lake table....

How to populate or update columns in an existing Delta table

Learn how to populate or update columns in an existing Delta table....

Identify duplicate data on append operations

...

Optimize a Delta sink in a structured streaming application

Optimize your Delta sink by using a mod value on the batchId to optimize when foreachBatch runs....

Unable to cast string to varchar

Use varchar type in Databricks Runtime 8.0 and above. It can only be used in table schema. It cannot be used in functions or operators....

Vaccuming with zero retention results in data loss

Do not disable spark.databricks.delta.retentionDurationCheck.enabled and run vacuum with retention zero to avoid data loss....

Z-Ordering will be ineffective, not collecting stats

Z-Ordering is ineffective, error about not collecting stats. Reorder table so the columns you want to optimize on are within the first 32 columns....

Change cluster config for Delta Live Table pipeline

Customize the cluster configuration when using a Delta Live Table pipeline....

Different tables with same data generate different plans when used in same query

Ensure that tables with the same data generate the same physical plans with Spark SQL....

Allow spaces and special characters in nested column names with Delta tables

Upgrade to Databricks Runtime 10.2 or later and use column mapping mode to allow spaces and special characters in column names....

Delta writing empty files when source is empty

Delta can write empty files under Databricks Runtime 7.3 LTS. You should upgrade to Databricks Runtime 9.1 LTS or above to resolve the issue....

Delta Live Tables pipelines are not running VACUUM automatically

You must have a maintenance cluster defined for VACUUM to run automatically....

VACUUM best practices on Delta Lake

Learn best practices for using, and troubleshooting, VACUUM on Delta Lake....

OPTIMIZE is only supported for Delta tables error on Delta Lake

Use CREATE OR REPLACE TABLE when moving Delta tables from one storage location to another....

Programmatically determine if a table is a Delta table or not

Use Python code in a Databricks notebook to determine if a table is a Delta table or not....

RESOURCE_LIMIT_EXCEEDED error when querying a Delta Sharing table

Delta Sharing has limits on the metadata size of a shared table. If you exceed these limits it generates an error....

Found duplicate columns error blocks creation of a Delta table

Duplicate column names are not allowed in Delta tables....

Hive-style partitions not found on Delta table after enabling column mapping mode

Delta Lake column mapping does not support Hive-style partitions....

Dropping and recreating Delta tables results in a DeltaVersionsNotContiguousException error

Instead of dropping and recreating Delta tables, use the CREATE OR REPLACE command....

"AnalysisException: Incompatible Format Detected" error when writing to OpenSearch

Make sure there is no _delta_log folder in your root directory....

AnalysisException error due to a schema mismatch

Modify the write command and set the mergeSchema property to true....

Timestamp change to underlying Apache Parquet/change data files while using Change Data Capture (CDC)

For timestamp-based queries, ensure that the original file timestamps are preserved during the migration process....

Unable to read Delta table with deletion vectors

Use the cluster with Databricks Runtime 12.2 LTS - 15.3 to query all deletion-vector-enabled Delta tables....

Unknown Apache Spark internal error when running Delta table queries

Reorganize the folder structure for the specific partition causing the problem. ...

Running OPTIMIZE on Delta tables causing ConcurrentDeleteDeleteException error

...

DELTA_CLUSTERING_COLUMN_MISSING_STATS error when attempting to define liquid clustering for a delta table

Ensure that you have generated Delta statistics for the columns used as clustering keys....

INSERT operation fails while trying to execute multiple concurrent INSERT or MERGE operations to append data

Make sure the isolation levels are correctly set or refactor to remove conflicts....

You do not use deletion vectors, but see a file named deletion vector in your data path

It is an artifact of low shuffle merge and is removed on the next VACUUM run....

Databricks Runtime is not able to read data in a format other than Delta

Delete the transactional log folder or move it to a different location. ...

Running a Python UDF fails with permission error

Ask function owner to grant EXECUTE permission....

COUNT operation on a DataFrame returning zero or incorrect number of records

Schedule operations to run sequentially, save the DataFrame to a checkpoint, and/or use snapshot isolation....

Error [DELTA_CLUSTERING_SHOW_CREATE_TABLE_WITHOUT_CLUSTERING_COLUMNS] when running SHOW CREATE TABLE command

Upgrade to Databricks Runtime 15 or above or disable the liquid clustering table feature....

FileReadException error when trying to run streaming job reading from system tables

Increase job frequency or the maxVersionsPerRpc....

DeltaFileNotFoundException when reading a table

Ensure that Delta log files are not getting deleted prematurely....

Error FileNotFoundException while streaming job or reading Delta table even with ignoremissingfiles set

Use the FSCK repair command to synchronize the metadata with the actual data files....

Syntax error when running vacuum with USING INVENTORY command

Upgrade your Databricks Runtime to version 15.2 or above. ...

How to get the full size of a Delta table or partition

Use a Scala command and pass in either the root path or the path to the partition....

Error when trying to copy datasets to different regions using Delta Sharing

Split your intervals into separate columns for day, hour, minute and second; convert the interval to a string, or convert the entire interval to seconds and store as an integer. ...

ETL process fails to process a column and throws error Row group size has overflowed

Reduce the default row group size and increase the frequency of size checks....

InvalidSchemaException error when trying to insert data into a Delta table

Define a field type for any fields that use a StructType within a StructField....

Job fails with ExecutorLostFailure error due to excessive garbage collection (GC)

Broadcast the smaller table instead of the larger one....

Parquet table last modification retrieval returns NULL

List the files within the parquet table path and sort them by the modificationTime column. ...

Time travel SELECT query works on older dates even after VACUUM

This is expected behavior but you can also test that your VACUUM command ran successfully. ...

Unable to exclude columns from a table based on specific strings in the comments

Leverage DESCRIBE TABLE to retrieve and filter on the metadata which includes comments....

Delta table as a streaming source returns error DELTA_FILE_NOT_FOUND_DETAILED even though no user or lifecycle rule has deleted files

Consume the source table from scratch, consume from a specific version, or load data using a specific timestamp as filter....

Symlink format manifest fails when trying to enable liquid clustering on a table

Disable deletion vectors or avoid using Symlink format manifest, as appropriate for your context. ...

DataFrame to Ray Dataset conversions taking a long time to execute

Set spark.task.resource.gpu.amount to 0, modify num_cpus_worker_node, or enable Spark cluster auto-scaling....

Files restored from a Delta table archive are not recognized by Delta with archival support enabled

Temporarily disable archival support or increase the value for the table property delta.timeUntilArchived....

Job failing with DELTA_CHANGE_DATA_FILE_NOT_FOUND error

Use ignoreMissingFile config or a new checkpoint....

Column statistics missing when running ANALYZE TABLE COMPUTE STATISTICS after ANALYZE TABLE COMPUTE STATISTICS FOR ALL COLUMNS

Only run ANALYZE TABLE COMPUTE STATISTICS FOR ALL COLUMNS to ensure column statistics remain available. ...

Error “Job aborted due to stage failure” when trying to shallow clone a large table with significant DeltaLog entries

Increase ​​spark.driver.maxResultSize to 6 GB or greater....

Iceberg metadata not reflecting latest changes made to table, appearing out of sync

Add `MSCK REPAIR TABLE SYNC METADATA` to the end of the ingestion job, or run manually after each ingestion....

Recover a dropped table when a new table is created with the same name

Rename the existing table and then UNDROP the deleted table....

Find the number of files per partition in a Delta table

Retrieve the partition structure of a Delta table and display the number of data files per partition value....

Intermittent long-running OPTIMIZE command for liquid clustered table

Use Databricks Runtime 16.2 or above to run the OPTIMIZE command....

Distinguish active and dead jobs

Learn how to distinguish between active and dead Databricks jobs....

Spark job fails with Driver is temporarily unavailable

Job failure due to Driver being unavailable or unresponsive....

How to delete all jobs using the REST API

Learn how to delete all Databricks jobs using the REST API....

Job cluster limits on notebook output

Job clusters have a maximum notebook output size of 20 MB. If the output is larger, it results in an error....

Job fails, but Apache Spark tasks finish

Your job fails, but all of the Apache Spark tasks have completed successfully. You are using spark.stop() or System.exit(0) in your code....

Job fails due to job rate limit

Learn how to resolve Databricks job failures due to job rate limits....

Job fails with invalid access token

Jobs that run more than 48 hours fail with invalid access token error when the dbutils token expires....

Task deserialization time is high

Configure cluster-installed libraries to install on executors at cluster launch vs executor launch to speed up your job task runs....

Pass arguments to a notebook as a list

Use a JSON file to temporarily store arguments that you want to use in your notebook....

Uncommitted files causing data duplication

Partially uncommitted files from a failed write can result in apparent data duplication. Adjust VACUUM settings to resolve the issue....

Multi-task workflows using incorrect parameter values

If parallel tasks running on the same cluster use Scala companion objects the wrong values can be used due to sharing a single class in the JVM....

Job fails with Spark Shuffle FetchFailedException error

Disable the default Spark Shuffle service to work around a FetchFailedException error....

Users unable to view job results when using remote Git source

Databricks does not manage permission for remote repos, so you must sync changes with a local notebook so non-admin users can view results....

Single scheduled job tries to run multiple times

Ensure your cron syntax is correct when scheduling jobs. A wildcard in the wrong space can produce unexpected results....

Add custom tags to a Delta Live Tables pipeline

Manually edit the JSON configuration file to add custom tags....

Update notification settings for jobs with the Jobs API

You can use the Jobs API to add email notifications to some, or all, of the jobs in your workspace....

Stop all scheduled jobs

Use the included sample code to stop all of your scheduled jobs in the workspace....

Cluster terminates automatically even if operation or command is still executing

Consider using Databricks Jobs for long-running operations. ...

Permissions error when trying to run job clusters

Ensure that the service principal has the 'Service Principal User' role....

Idle clusters causing inefficient resource use and increased costs

Set file arrival triggers....

Error when trying to create more new jobs than the limit quota

Confirm the amount of jobs you have in your workspace, then identify and delete the jobs you do not need....

Databricks cannot access a notebook in GitHub

Check your file type or GitHub credentials and permissions....

Unable to pass a param string value of more than 65,535 characters in a workflow using a JAR in a job

Pass the param using a text file in Workspace FileSystem (WSFS). ...

Trigger a job as a specific user with "Run As"

Use the UI or API to run a job as a specific user....

Need to see job creator when investigating a job but can only see service principal

Leverage the API to retrieve job creator details....

'Cluster does not support jobs workload' error during notebook or job run

Use a cluster policy that allows the dbutils.notebooks.run API, or run the code directly within a notebook to avoid the API. ...

Getting NullPointerException when using dbutils.secrets.get in jar jobs

Include the necessary dependencies for dbutils....

Long running jobs are terminated with a WORKSPACE_UPDATE error

Enable continuous jobs for long running workloads....

Filter condition in the for each task type not filtering correctly

Use param = :Param instead. ...

Jobs running longer than expected with 'Metastore_Down' events in event log

Run the VACUUM command to remove stale files, adjust the catalog update thread pool size in Databricks Runtime 14.3 LTS and above, or for read-only metastore databases, disable Delta catalog updates. ...

Previously working jobs now failing to execute with METASTORE_DOES_NOT_EXIST error

Only use the Databricks update job API to update the job cluster....

“No module named” error for dependent libraries within a job task

Set the libraries at the compute level for all-purpose compute, share libraries between tasks in non-serverless job clusters, or select from other options provided....

Job to insert Parquet file to table fails with error (FAILED_READ_FILE.PARQUET_COLUMN_DATA_TYPE_MISMATCH)

Fix the Parquet file’s schema to match the table’s schema....

String aggregation queries failing with data type mismatch error on serverless compute

Use explicit casting or disable ANSI_MODE....

Job with string data failing with [CAST_OVERFLOW_IN_TABLE_INSERT] overflow error

Change the data type of the source to an equivalent type as the target....

How to fetch the CREATE job JSON using an API call instead of the UI

Use the ‘settings’ key in the ‘/api/2.1/jobs/get’ API endpoint....

JDBC write operation fails with HiveSQLException error: The background threadpool cannot accept new task for execution

Change the spark.hive.server2.async.exec.threads, spark.hive.server2.async.exec.wait.queue.size, and spark.hive.server2.async.exec.keepalive.time configs to handle more concurrent asynchronous queries. ...

Error “number of currently active jobs exceeds hard limit of spark.databricks.maxActiveJobs” when trying to run an API request

Optimize job design first to the extent possible, then change the spark.databricks.maxActiveJobs setting to N, depending on your needs. ...

Members of a Gmail group email not receiving notifications

Allow external entities to email the group inbox. ...

Apache Spark jobs failing due to stage failure when using spot instances in a cluster

Use on-demand nodes instead of spot instances. ...

Broadcast join hash not being used despite hints

Refresh table statistics or use supported joins that allow for broadcast join....

Error compressed buffer size exceeds 2 GB when saving data

Set the Apache Spark configs to increase the frequency of row group size check....

Error when trying to use RDD code in shared clusters

Use a single-user cluster, which supports RDD functionality....

File corruption error on Apache Spark Streaming jobs during file processing in DBFS

Replace dbutils.fs operations with Hadoop filesystem methods. ...

Jobs failing at data shuffle stage with error org.apache.spark.shuffle.FetchFailedException

Analyze the shuffle data distribution across executors and join query strategies....

Apache Spark job output only giving the first JSON object instead of all records

Add appropriate line breaks between each JSON object or use Photon....

DAB job parameters not passing in correctly on the task level

Correct the syntax....

Recurring Apache Spark jobs with same data set size and cluster configuration vary in duration

Build your cluster with sufficient SSD memory, monitor your cluster’s disk usage, and optimize data storage....

Resolve invalid cast input error on serverless compute

Set spark.sql.ansi.enabled to false to resolve casting errors on serverless compute....

Cannot import TabularPrediction from AutoGluon

Cannot import TabularPrediction from AutoGluon v0.0.14 due to a namespace collision. Upgrade to AutoGluon v0.0.15....

How to correctly update a Maven library in Databricks

Learn how to correctly update a Maven library in Databricks....

Init script fails to download Maven JAR

Cluster init script fails to download a Maven JAR when trying to install a library....

Install package using previous CRAN snapshot

Avoid a package install error by installing from an earlier CRAN snapshot....

Install PyGraphViz

Install PyGraphViz with all required dependencies....

Install Turbodbc via init script

Install Turbodbc and its dependencies, libboost-all-dev, unixodbc-dev, and python-dev, with an init script....

Cannot uninstall library from UI

Learn what to do when you can't uninstall a library using the Databricks user interface....

Error when installing Cartopy on a cluster

Cartopy installation fails if libgeos and libproj are not installed....

Error when installing pyodbc on a cluster

Learn how to troubleshoot an error when installing pyodbc on a Databricks cluster....

Libraries fail with dependency exception

Learn why notebook-scoped libraries trigger an Apache Spark dependency exception; return a requirement cannot be satisfied error....

Reading .xlsx files with xlrd fails

xlrd no longer supports .xlsx files. Use openpyxl to read .xlsx files....

Remove Log4j 1.x JMSAppender and SocketServer classes from classpath

Remove Log4j 1.x JMSAppender and SocketServer classes from classpath....

Python command fails with AssertionError: wrong color format

Resolve a wrong color format AssertionError caused by nbconvert when a Python command fails....

PyPMML fails with Could not find py4j jar error

...

TensorFlow fails to import

TensorFlow fails to import if you have an incompatible version of protobuf installed on your cluster....

Verify the version of Log4j on your cluster

Verify the version of Log4j installed on your cluster and upgrade if required....

Apache Spark jobs fail with Environment directory not found error

Spark jobs appear to time out after you install a library because security rules are preventing workers from resolving the Python executable path....

Copy installed libraries from one cluster to another

Copy libraries from a source cluster to a target cluster with a custom Python script....

Failed to install Elasticsearch via Maven

If library dependencies are already installed, it can result in a library installation failure....

Cluster fails to start with InvalidGroup.NotFound error

If the network security group policy is not correctly configured your clusters will fail to start....

Add libraries to a job cluster to reduce idle time

How to add libraries to a job cluster and reduce idle time in Databricks...

PyArrow hotfix breaking change

PyArrow versions 0.14 - 14.0.0 contain a security vulnerability....

OpenSSL SSL_connect: SSL_ERROR_SYSCALL error

Use a cluster-scoped init script to install necessary SSL certificates to resolve a SSL_ERROR_SYSCALL error....

Notebook cells fail to run with "Failure Starting repl." and Pandas "check_dependencies" errors

Ensure you do not have a dependency mismatch with the NumPy and/or Pandas versions installed on your cluster....

Virtualenv creation failure due to setuptools >= 71.0.0

Pin setuptools version 70.3.0....

Libraries failing with owner or network errors on Databricks Runtime 13.3 LTS - current (15.3)

Manually adjust your custom index URL. ...

Maven Libraries Start Failing with Timed-Out Errors When Updating to Databricks Runtime 11.3 LTS - 15.3 (current)

Whitelist Maven Central and the new Maven repo....

Paths behave differently on Git folders and workspace folders

Git folders can reference the project root, while workspace folders reference the current working directory....

GDAL library installation

Troubleshooting GDAL init script issues...

Installing lme4 fails with a Matrix version error

Upgrade the version of Matrix to 1.6.2 or above before installing lme4....

User not found error while trying to install a library on a shared cluster

Change cluster ownership and reconfigure all libraries under the new owner....

Init script to set up Dask library fails and cluster won’t start

Modify the initialization script to include a validation check for the required environment variables first....

Office365 library installation causes numpy.dtype size change error while executing notebook commands

Pin the Moviepy library version that uses the NumPy version compatible with your Databricks Runtime version....

Fixture not found error when using pytest on a cluster

Downgrade pytest to version 8.3.2 or upgrade Databricks Runtime to 16.1 or above....

Error when attempting to use 'stream_read_table' function from Sparklyr in 14.3 LTS ML

Install Sparklyr version 1.8.6 in the cluster's libraries, restart the cluster, and rerun the function to ensure the error is fixed....

Library installation attempted on the driver node of the cluster failed

Uninstall and reinstall the library. ...

Py4JJavaError when trying to install libraries on SSL-encrypted cluster

Set the Apache Spark configuration to disable SSL....

Unable to install R package 'Survminer' on cluster

Use an init script to install a compatible version of R and the necessary dependencies....

DLTImportException error when importing the DLT module

Use a cluster-scoped init script targeting the job or cell commands in a notebook. ...

ClassNotFoundException error when executing a job or notebook with a custom Kryo serializer

Use an init script or use the spark.jars property in your Apache spark configuration....

Error during Maven library installation: ERROR_MAVEN_LIBRARY_RESOLUTION

Install libraries separately, host a private Maven mirror, or if necessary use another Maven mirror....

Error when attempting to install torch for R package

Install the required dependencies before installing torch for R....

Getting ValueError when trying to import PMML files using PyPMML

Remove -XX:+PrintFlagsFinal flag from Java options....

Getting timeout error during Maven library installation on Databricks cluster

Configure your cluster to use private repos as the default repository, and disable the default Maven Central resolver and Apache Spark packages resolver....

Conda fails to download packages from Anaconda

Conda fails to download packages with PackagesNotFoundError when you try to install packages from Anaconda....

Download artifacts from MLflow

How to download artifacts from MLflow to local storage....

How to extract feature information for tree-based Apache SparkML pipeline models

Learn how to extract feature information for tree-based ML pipeline models in Databricks....

Fitting an Apache SparkML model throws error

Learn how to resolve errors thrown by Databricks when fitting a SparkML model or pipeline....

H2O.ai Sparkling Water cluster not reachable

H2O.ai Sparkling Water cluster not reachable if the version of the Sparkling Water package does not match the version of Spark used on your cluster....

How to perform group K-fold cross validation with Apache Spark

Learn how to perform group K-fold cross validation with Apache Spark on Databricks....

MLflow project fails to access an Apache Hive table

Resolve "Table or view not found" error when an MLflow project fails to access an Apache Hive table....

How to speed up cross-validation

Learn how to improve cross-validation performance in SparkML with Databricks....

Hyperopt fails with maxNumConcurrentTasks error

Do NOT install Hyperopt on a Databricks Runtime for Machine Learning cluster....

Incorrect results when using documents as inputs

Your model does not return expected results when documents are input using TfidfVectorizer. JSON array...

Experiment warning when custom artifact storage location is used

Resolve experiment warnings when a custom artifact storage location is used instead of the MLflow managed location....

Experiment warning when legacy artifact storage location is used

Resolve experiment warnings when a legacy artifact storage location is used instead of the MLflow managed location....

KNN model using pyfunc returns ModuleNotFoundError or FileNotFoundError

Predictions using pyfunc on a KNN model returns a ModuleNotFoundError or FileNotFoundError....

OSError when accessing MLflow experiment artifacts

Resolve an `OSError` when trying to access, download, or log MLflow experiment artifacts....

PERMISSION_DENIED error when accessing MLflow experiment artifact

Resolve a PERMISSION_DENIED error when trying to access MLflow experiment artifacts....

Runs are not nested when SparkTrials is enabled in Hyperopt

When SparkTrials is enabled in Hyperopt, MLflow runs are not nested under the parent run....

Unable to update a serving endpoint even with necessary permissions

Find the creating user in the workspace and re-add the permissions....

Status FAILURE when attempting to update a Direct Vector Access Index

Ensure that the embedding_dimension parameter matches the length of the embedding field. ...

Table not available while creating AutoML experiment model

Migrate to Unified Compute (UC), with the option to use AutoML with the Python API in the meantime....

Failing API calls in MLflow because of Float64 column values

Explicitly log the input schema while creating the model....

Trying to load an MLflow model using a Python script returns Py4JJavaError

Upgrade MLflow to version 2.15.0 or above. ...

TypeError with an unexpected keyword argument 'query_type' when attempting to perform hybrid similarity search using the databricks-vectorsearch package

Ensure you have the latest version of the databricks-vectorsearch package installed in your environment....

Error message when trying to send a JSON input data request to a model endpoint

Pass one more input parameter from the list of input columns in the endpoint’s model signature....

CUDA out of memory error message in GPU clusters

Change the GPU device used by your driver and/or worker nodes....

Slow model fitting when implementing Alternating Least Squares using Apache Spark PySpark

Override the block default to match the total cores available and consider using compute-optimized instances. ...

Vector search index queries with the `%` character not performing partial-string matches

When using the `LIKE` operator in vector search filters, specify the exact string you want to match...

Column name error when using Apache Spark Mlib feature transformers

When flattening the DataFrame, rename nested columns using an underscore instead of a dot....

Logging a model with MLflow in a PySpark pipeline throws a TempDir class assertion error

Upgrade your MLflow version to 2.16.0 or higher....

MLflow API 429 errors when transitioning models

Add retry logic with exponential backoff to avoid hitting the rate limit....

Model serving endpoint creation succeeds but deployment fails and error stack trace has message _ARRAY_API not found

Include NumPy as a pip dependency and specify the version range to be installed. ...

Slowness when using the foundational model API with pay-per-token mode

Switch to provisioned throughput mode for high throughput and performance guarantee requirements....

Getting ValueError: ndarray is not supported by dataframe_to_mds when converting an Apache Spark DataFrame to MDS format using Mosaic Streaming

Properly pass the data type of the elements of the array column in the mds_kwargs....

Spark ML to ONNX Model Conversion does not produce the same model - predictions differ

Define the TARGET_OPSET and then pass it as the target_opset parameter of the convert_sparkml function. ...

MLflow exception error when trying to migrate models from Workspace Model Registry

Set the registry URI to the Workspace Model Registry before running the MLflow operations. ...

Loading models using MLflow causes TypeError around unexpected number of arguments

Run your cluster using a Databricks Runtime version that has the same Python version as the one used to log and register your model....

ExecutionException error when trying to use Conda as an environment manager in MLflow

Update the MLflow environment manager from Conda to virtualenv. ...

MLflow error "INVALID_PARAMETER_VALUE" during model training and logging process

Ensure each MLflow run maintains a unique set of parameters or use nested runs to log each parameter distinctly within a session. ...

SparkException error when trying to use an Apache Spark UDF to create and dynamically pass a prompt to the ai_query() function

Use Unity Catalog (UC) UDFs instead of Spark UDFs. ...

“Connection pool is full” error when pulling models from S3 with MLflow

Increase the maximum size of the MLflow connection pool....

Using MLflow API call to load a model taking the same amount of time every call and artifacts downloading from scratch

Save the model artifacts locally and then load the model from a local path....

java.lang.OutOfMemoryError error when using collect() from sparklyr

Use arrow_collect() in a custom function to avoid Spark’s 2GB limit when collecting large datasets in R....

Parameter workload_size always executing SMALL when using the databricks-agents library to update existing model serving endpoints

Update the databricks-agents library to version 0.17.0 or later....

'INVALID_PARAMETER_VALUE' error when creating a Google Vertex AI serving endpoint

Ensure the entire private key is used....

Model serving endpoint creation fails with BadRequest error

Shorten the catalog name or specify the endpoint_name explicitly when using agents.deploy....

Not enough disk space error when downloading a model from Hugging Face

Change the default download directory from the root partition to a location with available space....

SHAP figure not appearing in the artifacts after running the mflow.evaluate() call, despite setting log_model_explainability = True

Ensure that all features are in the expected format and re-run the call. ...

Error when trying to use VectorAssembler while on a standard access mode cluster with a non-ML Databricks Runtime

Use a Dedicated (formerly single user) access mode cluster, assigned to a group of users....

Getting NoModuleFound or attribute error when using the Flash Attention model in MLflow

Use mlflow.transformers.log_model with a custom wheel version of flash-attn....

Lineage for the output table with predictions is not tracked in MLflow when training a model

Save the output table as a CSV file and log it as an artifact. ...

GPU metrics indicate that the GPU is not being used during model inference

Ensure that you are sending the model to the GPU in your code....

AttributeError: 'ExportMetricsResponse' when retrieving serving endpoint metrics

Use a custom Python script to download and save the serving endpoint metrics to a file in the Prometheus format....

MlflowClient().search_runs returns only a subset of runs

Use mlflow.search_runs() instead of MlflowClient.search_runs()....

Function ai_similarity failing with “Unexpected server response" error

Remove NULL values from the data before passing it to the function. ...

Tackling schema issues that arise for ML models trained outside of Databricks

Use the code from the external environment to retrain the model within Databricks before fine-tuning....

Autoscaling is slow with an external metastore

Improve autoscaling performance by only installing metastore jars to the driver....

Data too long for column error

If a column exceeds 4000 characters it is too big for the default datatype and returns an error....

Drop database without deletion

Use Hive commands to drop a database without deleting the underlying storage folder....

Error in CREATE TABLE with external Hive metastore

CREATE TABLE error with MySQL 8.0 in external Hive metastore due to charset....

Japanese character support in external metastore

Use Japanese characters in tables in an external metastore....

Parquet timestamp requires Hive metastore 1.2 or above

Update the Hive metastore to version 1.2 or above to use TIMESTAMP with a Parquet table....

Error while establishing user sessions to Oracle database through an external Hive metastore

Increase the session limit on your Oracle database or increase your pool size using an Apache Spark configuration....

Learn about Apache Hive metastore costs

The Hive metastore does not have direct costs, but it does have associated use costs....

Fetching the last access date/time of tables across all workspaces runs slowly and inefficiently

Databricks recommends using audit log system tables. ...

JSON reader parses values as null

When you read a JSON file, the Spark JSON reader returns null values instead of the actual data....

display() does not show microseconds correctly

Use show() to display timestamp values with microsecond precision. display() is limited to millisecond precision....

Error: Received command c on object id p0

You see the error message `INFO:py4j.java_gateway:Received command c on object id p0` after running Python code with imported libraries....

Failure when accessing or mounting storage

Do not mount storage to the root mount path....

Update job permissions for multiple users

Use the job permissions API to update permissions for multiple users....

Generate browser HAR files

Learn how to record HAR files in your web browser. These are very useful when troubleshooting UI issues....

Recover deleted notebooks from the Trash

Deleted items can be recovered from the Trash for 30 days after deletion....

Get workspace configuration details

Display the complete configuration details for your Databricks workspace....

Iterate through all jobs in the workspace using Jobs API 2.1

Use the Jobs API 2.1 to iterate through and display a list of jobs in your workspace....

Too many execution contexts are open right now

Reduce the number of notebooks used to limit the number of execution contexts required for your job....

Generate a list of all workspace admins

Use the included sample code to generate a list of all workspace admins....

%run magic command not working as expected with %python listed first

Ensure that the %run command is the first line in the command cell....

Permissions error when accessing Unity Catalog tables

Use a shared cluster or warehouse, use serverless, or upgrade to Databricks Runtime 15.4 LTS or above. ...

Error when trying to read a notebook from another notebook in the same workspace

Use the Databricks SDK to read a notebook’s contents. ...

Git-integrated workloads fail in Databricks with “PERMISSION_DENIED: Invalid Git provider credentials” error

Check Git provider credentials and token settings....

Unable to import from DBC file: INVALID_PARAMETER_VALUE error

You must set "direct_download": "true" when exporting via the API....

SSL exception when connecting to GCP secret manager

GCP secret manager requires GCM cipher suites to be installed on your cluster. Databricks Runtime 10.4 LTS and above have GCM cipher suites enabled by default....

Bulk update workflow permissions for a group

Use this sample code to update a single group's permissions for all the jobs in a workspace....

Restricting sensitive data in the workspace

Store your data in a way that makes permissions management easier....

CORS policy error when trying to run Databricks API from a browser-based application

Implement a server-server communication model. ...

Running general queries against anonymous or temporary functions fails with INSUFFICIENT_PERMISSIONS error

Provide the affected entity with the required permission from the workspace admin level, or in Databricks SQL delete the spark.databricks.acl.sqlOnly true setting....

Granting SELECT permissions to specific user groups on a subset of tables only

Use SQL to manually grant permission or the Catalog UI. ...

SSO SAML failure when authenticating in Databricks using Active Directory Federation Services (AD FS)

Update the emailaddress in AD FS to remove any trailing newline or whitespace characters....

OIDC Single Sign-On authentication error during login

Ensure the client secret is valid and troubleshoot using a HAR file to identify the root cause....

DS_RESOURCE_NOT_FOUND_ON_DS_SERVER error when a data recipient tries to access views from a dedicated cluster

Utilize TOKEN-based sharing....

How to fetch Databricks resource permissions

Use the API to retrieve and display members of a group and their access permissions in your workspace....

Append output is not supported without a watermark

Append output mode is not supported on aggregated DataFrames without a watermark....

Apache Spark DStream is not supported

DStreams are not supported in Databricks. Migrate from DStream API to Structured Streaming....

Streaming with File Sink: Problems with recovery if you change checkpoint or output directories

Learn how to resolve issues that occur with recovery if you change checkpoint or output directories when streaming with File Sink....

Get the path of files consumed by Auto Loader

Get the path and filename of all files consumed by Auto Loader and write them out as a new column....

How to restart a structured streaming query from last written offset

Learn how to restart a structured streaming query from the last written offset....

Kafka error: No resolvable bootstrap urls

A 'No resolvable bootstrap urls' error occurs when you try to read or write data to a Kafka stream....

readStream() is not whitelisted error when running a query

readStream() is not whitelisted error on clusters that have table access control enabled....

Checkpoint files not being deleted when using display()

Learn how to prevent display(streamingDF) checkpoint files from using a large amount of storage....

Checkpoint files not being deleted when using foreachBatch()

Learn how to prevent foreachBatch() checkpoint files from using a large amount of storage....

Conflicting directory structures error

You should use distinct paths in the storage location, otherwise conflicting directory structures may result in an error....

RocksDB fails to acquire a lock

When using RocksDB as a state store, you may need to increase the acquire timeout in the SQL config....

Streaming job gets stuck writing to checkpoint

Streaming job appears to be stuck even though no error is thrown. You are using DBFS for checkpoint storage, but it has filled up....

Explicit path to data or a defined schema required for Auto loader

If you do not specify an explicit path to your data or define your data schema, you get an IllegalArgumentException error when you start an Auto loader job....

Optimize streaming transactions with .trigger

Use .trigger to define the storage update interval. A higher value reduces the number of storage transactions....

Structured streaming jobs slow down on every 10th batch

Automatic compaction of the metadata folder can slow down structured streaming jobs....

Get last modification time for all files in Auto Loader and batch jobs

Define a UDF to list all files in the path and return the last modification time for each one....

Stream to stream join failure

Avoid using a memory sink when running streaming queries with stream to stream join....

Offset reprocessing issues in streaming queries with a Kafka source

Resolve Kafka offset reprocessing issues in Structured Streaming by using a new checkpoint directory....

Autoloader job fails with a URISyntaxException error due to invalid characters in filenames

When using Directory listing mode you should not process files with colons in the filename. ...

Auto Loader streaming job failure with schema inference error

To selectively read a specific type of file using Auto Loader, use the pathGlobFilter option....

Auto Loader streaming query failure with unknownFieldException error

Use schema evolution to avoid streaming query failures when new columns are added to your data....

Casting string to date/timestamp in DLT pipeline does not throw an error

Configure the Delta Live Tables pipeline to enforce ANSI SQL compliance. ...

Auto Loader fails to pick up new files when using directory listing mode

Use file notification mode or disable incremental listing....

Incorrect input record count in Apache Spark streaming application logs/micro-batch metrics

Optimize actions on the DataFrame within the foreachBatch function. ...

Upgrading to 14.3 LTS gives the error "com.databricks.sql.cloudfiles.errors.CloudFilesIllegalArgumentException"

Choose to configure either manually or via schema evolution....

Streaming application missing data from a Delta table when writing to a given destination

Restart a streaming query on a new checkpoint folder with startingVersion option pointing to the next Delta version (X+1)....

How to efficiently manage state store files in Apache Spark streaming applications

Control the lifecycle of state store files using streaming configurations...

Auto Loader failures with java.io.FileNotFoundException for SST and log files

Use a separate checkpoint folder outside of the Delta directory....

Stateful Structured Streaming jobs fail after making changes to stateful operations

Avoid changes to stateful operations between restarts....

Structured Streaming job fails with a Streaming Query Exception when a schema changes in the source table

Enable schema tracking and set allowSourceColumnRenameAndDrop to true....

Duplicates appearing in Auto Loader with file notification feature despite set backfill interval

Remove the allowOverwrites configuration or implement a deduplicate logic....

writeStream/readStream leads to an error when the schema contains “NullType”

Replace NullType with a literal None value and then cast it to StringType. ...

Resumed streaming job fails after pause with StreamingQueryException error

Avoid pausing streaming jobs for longer than the delta.logRetentionDuration value, or restart the stream with a new checkpoint location....

DLT pipeline is very slow when using Auto Loader and a Glob filter

Configure Auto Loader with file notification mode....

Getting an InconsistentReadException error after updating to Databricks Runtime 13.3 LTS or above

Disable file status caching to reduce the time between file status checks. ...

Using glob patterns for directory filtering impacting Auto Loader performance

Use a more specific root path to reduce the scope of the initial scan....

[CONCURRENT_QUERY] Error on Auto Loader job

Set the Auto Loader job to be configured to run in "continuous" mode instead of "available now" mode....

Structured Streaming workflow reading data from CDC is failing

Set spark.databricks.streaming.stateStore.stateSchemaCheck.ignoreNullCompatibility to true....

Stateful Streaming query failing with SparkSecurityException error after restarting on a shared cluster or serverless

Switch the cluster access mode....

Receiving com.databricks.sql.io.FileReadException: Error while reading file on streaming queries

Ensure the delta.deletedFileRetentionDuration value is longer than the time it takes your query to complete....

Auto Loader (file notification mode) fails to identify new files from the cloud queue service

Ensure that messages in the cloud queue are of the expected format....

Unable to use fields with qualifiers in the DLT Apply Changes API

Ensure that qualifiers are extracted prior to reference in the Apply Changes definition....

NoSuchMethodError import failure of Protobuf-java when trying to run Apache Spark workflow

Shade the Protobuf class in the JAR....

AttributeError: ‘function’ object has no attribute

Using protected keywords from the DataFrame API as column names results in a function object has no attribute error message....

Convert Python datetime object to string

Display date and time values in a column, as a datetime object, and as a string....

Display file and directory timestamp details

Display file creation date and modification date using Python....

Reading large DBFS-mounted files using Python APIs

Learn how to resolve errors when reading large DBFS-mounted files using Python APIs....

How to import a custom CA certificate

Learn how to import a custom CA certificate into your Databricks cluster for Python use....

Job remains idle before starting

Apache Spark jobs remain idle for a long time before starting....

List all workspace objects

List all Databricks workspace objects under a given path....

Python commands fail on high concurrency clusters

Python commands fail on high concurrency clusters with Apache Spark process isolation and shared session enabled. WARN error message....

Cluster cancels Python command execution after installing Bokeh

Learn what to do when your Databricks cluster cancels Python command execution after you install Bokeh....

Cluster cancels Python command execution due to library conflict

Learn what to do when your Databricks cluster cancels Python command execution due to a library conflict....

Python command execution fails with AttributeError

Learn what to do when a Python command in your Databricks notebook fails with AttributeError....

Job fails with Java IndexOutOfBoundsException error

When groupby() is used along with applyInPandas it generates an exception due to an arrow buffer limitation....

Job fails with NoSuchElementException error

NoSuchElementException errors can occur when using Apache Arrow....

Job fails with IndexOutOfBoundsException and ArrowBuf errors

When Groupby is used with applyinPandas it can result in Apache Arrow buffer size estimation errors....

Field name sorting changes in Apache Spark 3.x

Starting with Spark 3.0.0, rows created from named arguments do not have field names sorted alphabetically....

Job fails with "not enough memory to build the hash map" error

You should use adaptive query execution instead of explicit broadcast hints to perform joins on Databricks Runtime 11.3 LTS and above....

Create a DataFrame from a JSON string or Python dictionary

Create an Apache Spark DataFrame from a variable containing a JSON string or a Python dictionary....

Behavioral changes for the CHAR data type on Serverless

Pad your reads with spaces to match the declared length of the CHAR field or set the legacy charVarcharAsString config to true....

Column value errors when connecting from Apache Spark to Databricks using Spark JDBC

Use overriding quote identifiers in the JdbcDialect class and register them under JDBCDialects in Java or Python....

Trying to decode a protocol buffer and getting error [PROTOBUF_DEPENDENCY_NOT_FOUND]

Use the option --include_imports while creating the protobuf descriptor file, and then use this descriptor file in the from_protobuf() function....

Error java.io.FileNotFoundException when job attempts to read or write intermediary files

Cache the DataFrame before performing write operations and ensure you are using a compatible version of the com.crealytics.spark.excel library. ...

Using Pyspark testing library assertDataFrameEqual throws OutOfMemoryError

Verify schemas are equivalent, then either ensure sufficient driver memory or compare a subset of DataFrames. ...

Expensive transformation on DataFrame is recalculated even when cached

Understand how Apache Spark DataFrame caching works....

Error java.lang.UnsupportedOperationException when trying to read datetime data files

Set spark.sql.legacy.parquet.datetimeRebaseModeInRead to LEGACY. ...

Apache Spark PySpark job using a Python threading API function taking hours instead of minutes

Use the Databricks Spark connector and ensure your cluster configuration is optimized for the workload....

PySparkValueError when working with UDFs in Apache Spark

Ensure that the Python UDF output matches the schema defined in the source code. ...

Unable to parallelize the code using the apply API from Pandas on PySpark

Directly use the apply function from pyspark.pandas without wrapping it in a lambda function....

Runtimes increase when using .loc() and assignment(=) operations

Use vectorized operations instead....

Unable to get Apache Spark SparkEnv settings via PySpark

To get the same output using PySpark, broadcast the “test” value to the executors so you can perform the map operation on the executors....

RESOURCES_EXHAUSTED error message when trying to perform self-joins with Spark Connect

Increase the max message size using the spark.sql.session.localRelationCacheThreshold config or use temporary views. ...

DataFrame in an interactive cluster still showing cached data after calling unpersist() function

Use unpersist(blocking=True) to ensure unpersist() is performed before proceeding with further actions....

Apache Spark Submit job clusters do not terminate after sc.stop()

Explicitly invoke System.exit(0) after SparkContext.stop()....

Error PySparkNotImplementedError when using an RDD to extract distinct values on a standard cluster

Use .collect() and list comprehension to extract distinct column values....

Use snappy and zstd compression types in a Delta table without rewriting entire table

Test your compression type, generate, and insert sample records using zstd, then write the zstd files to your Delta table....

Using collect_list after transformations such as JOIN returns inconsistent counts even though the underlying data doesn’t change

Sort the collect_list output using array_sort before performing joins....

Change version of R (r-base)

Learn how to change the version of R on your Databricks cluster....

Fix the version of R packages

Learn how to fix the version of R packages....

How to parallelize R code with gapply

Learn how to parallelize R code using gapply....

How to parallelize R code with spark.lapply

Learn how to parallelize R code using spark.lapply....

Install rJava and RJDBC libraries

Learn how to install rJava and RJDBC libraries on your Databricks cluster....

Rendering an R markdown file containing sparklyr code fails

Learn how to resolve failures when rendering an R markdown file containing sparklyr....

Resolving package or namespace loading error

Learn how to resolve package or namespace loading errors in a Databricks notebook....

RStudio server backend connection error

RStudio server backend connection error occurs if you exceed the maximum number of RBackends on your cluster....

Verify R packages installed via init script

Verify that R packages successfully installed via an init script. List all R packages that failed to install....

Apache Spark UI is not in sync with job

Status of Spark jobs gets out of sync with the Spark UI when events drop from the event queue before being processed....

Apache Spark job fails with Parquet column cannot be converted error

Parquet column cannot be converted error appears when you are reading decimal data in Parquet format and writing to a Delta table....

Cannot import timestamp_millis or unix_millis

Cannot use timestamp_millis or unix_millis directly with a DataFrame. You must first use selectExpr() or use SQL commands....

Cannot modify the value of an Apache Spark config

You cannot modify the value of a Spark config setting within a notebook. It must be set at the cluster level....

Convert nested JSON to a flattened DataFrame

How to convert a flattened DataFrame to nested JSON using a nested case class....

Decimal$DecimalIsFractional assertion error

Using `round()` or casing a double to decimal results in a `Decimal$DecimalIsFractional` assertion error. java.lang.AssertionError assertion failed...

from_json returns null in Apache Spark 3.0

Spark 3.0 and above cannot parse JSON arrays as structs; from_json returns null....

Manage the size of Delta tables

Recommendations that can help you manage the size of your Delta tables....

Select files using a pattern match

Use a glob pattern match to select specific files in a folder....

Job fails with ExecutorLostFailure due to “Out of memory” error

Resolve executor failures where the root cause is due to the executor running out of memory.....

Job fails with ExecutorLostFailure because executor is busy

Resolve executor failures where the root cause is due to the executor being busy....

Understanding speculative execution

Learn how speculative execution works, how to identify it, and when you should use it....

Use custom classes and objects in a schema

You must define custom classes and objects inside a package if you want to use them in a notebook. ...

Jobs fails with a TimeoutException error

This error is usually caused by a Broadcast join that takes excessively long to complete....

Sort failed after writing partitioned data to parquet using PySpark on Databricks Runtime 13.3 LTS

Set the Apache Spark configuration to set the sorted data after writing partitioned data to parquet....

Reading Avro files with Structured Streaming using wildcards in the path fails with error ArrayIndexOutOfBoundsException

Add an option to enable recursively reading bulk Avro files using a wildcard path....

WithColumn operation when using in-loop slows performance

Use the select operator instead....

Extract timestamps with precision up to nano seconds from a long column

Create a UDF to extract the nanoseconds from the LongType....

Date functions only accept int values in Apache Spark 3.0

Date functions only accept int values in Apache Spark 3.0; fractional and string values return AnalysisException error....

Duplicate columns in the metadata error

Spark job fails while processing a Delta table with org.apache.spark.sql.AnalysisException Found duplicate column(s) in the metadata error....

Generate unique increasing numeric values

Use Apache Spark functions to generate unique and increasing numbers in a column in a table in a file or DataFrame....

Error in SQL statement: AnalysisException: Table or view not found

Learn how to resolve the AnalysisException SQL error "Table or view not found"....

Error when downloading full results after join

If you have duplicate columns after a join, you will get an error when trying to download the full results....

Error when running MSCK REPAIR TABLE in parallel

Do not run `MSCK REPAIR` commands in parallel. It results in a read timed out or out of memory error message....

Find the size of a table snapshot

How to find the size of a table....

Inner join drops records in result

Avoid dropped records when performing an inner join....

Data is incorrect when read from Snowflake

Data read from Snowflake is incorrect when time zone value is not set correctly....

JDBC write fails with a PrimaryKeyViolation error

JDBC write to a SQL database fails with a `PrimaryKeyViolation` error or results in duplicate data...

Query does not skip header row on external table

External Hive tables do not skip the header row when queried from Spark SQL....

SHOW DATABASES command returns unexpected column name

Running the `SHOW DATABASES` command returns an unexpected column name....

Cannot view table SerDe properties

SHOW CREATE TABLE only returns the Apache Spark DDL. It does not show the SerDe properties....

Parsing post meridiem time (PM) with to_timestamp() returns null

When converting 12-hour time to 24-hour time with to_timestamp() the hours variable must be lowercase....

to_json() results in Cannot use null as map key error

You must filter or replace null values in your input data before using to_json()....

Set nullability when using SaveAsTable with Delta tables

Learn how to create a Delta table with the nullability of columns set to false....

Ensure consistency in statistics functions between Spark 3.0 and Spark 3.1 and above

Statistics functions in Databricks Runtime 7.3 LTS and below return NaN when a divide by zero occurs. Set a Spark config to return null instead....

Using datetime values in Spark 3.0 and above

How to correctly use datetime functions in Spark SQL with Databricks runtime 7.3 LTS and above....

ANSI compliant DECIMAL precision and scale

Learn how to enable ANSI compliant error messages when incorrect values are used for DECIMAL precision and scale....

Recreate LISTAGG functionality with Spark SQL

Use collect_list and concat_ws in Spark SQL to achieve the same functionality as LISTAGG on other platforms....

Decreased performance when using DELETE with a subquery on Databricks Runtime 10.4 LTS

Auto optimize should be disabled when you have a DELETE with a subquery where one side is small enough to be broadcast....