SSO server redirects to original URL, not to vanity Databricks URL

SSO configuration should use the vanity URL as the base target URL....

SSO SAML authentication error with PingFederate

...

Find your workspace ID

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

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. ...

Your instance is not supported in your availability zone

Add additional subnets to your workspace in new availability zones....

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....

AWS services fail with No region provided error

AWS services fail with a Java "No region provided" error in Databricks Runtime 7.0 and above....

Troubleshooting Amazon Redshift connection problems

Learn how to troubleshoot Amazon Redshift connection problems....

Vulnerability scan shows vulnerabilities in Databricks EC2 instances

Learn how to resolve vulnerabilities in long-running Databricks EC2 instances....

Configure custom DNS settings using dnsmasq

Learn how to configure custom DNS settings using dnsmasq....

Unable to load AWS credentials

...

Access denied when writing logs to an S3 bucket

Learn how to resolve an access denied error while writing logs to an S3 bucket....

S3 part number must be between 1 and 10000 inclusive

Learn how to resolve the S3 part number must be between 1 and 10000 inclusive error....

How to analyze user interface performance issues

Learn how to troubleshoot Databricks user interface performance issues....

Unable to mount Azure Data Lake Storage Gen1 account

Learn how to resolve errors that occur when mounting Azure Data Lake Storage Gen1 to Databricks....

Failed credential validation checks error with Terraform

You get a 'Failed credential validation checks' error message when using Terraform to deploy a Databricks workspace in AWS....

Deployment name prefix not defined in Terraform

You must have a deployment_name defined in Databricks, before using it to deploy workspaces with Terraform....

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

Check your NSG and port settings. ...

Workspace creation failure when using Terraform

Check SCPs and make adjustments. ...

Clusters terminating with error AWS_INSUFFICIENT_FREE_ADDRESSES_IN_SUBNET_FAILURE (CLIENT_ERROR)

Increase the size of your subnet to allow for more IP addresses or free up some of the IP addresses currently in use....

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....

Unable to deploy clusters or warehouses due to a SECURITY_DAEMON_REGISTRATION_EXCEPTION error

Configure an STS interface endpoint on your VPC....

Apache Spark driver failing with unexpected stop and restart message

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

Unable to create a workspace using Quickstart when IP access list is enabled for accounts console

Contact AWS Support for further assistance on IP ranges for allow listing or temporarily disable the Databricks account IP access list....

Unexpected increase in S3 billing costs

Enable S3 debug logs to capture API calls made to the S3 bucket....

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....

Enable OpenJSSE and TLS 1.3

Add OpenJSSE to allow the use of TLS 1.3 for encrypted data transmission....

How to calculate the number of cores in a cluster

Learn how to calculate the number of cores in a Databricks cluster....

Install a private PyPI repo

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

IP access list update returns INVALID_STATE

Cannot update IP access list. INVALID_STATE error message....

Launch fails with Client.InternalError

Cluster launch fails with Client.InternalError on a E2 workspace due to IAM role KMS key policy....

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....

Cluster failed to launch

Learn how to resolve cluster launch failures....

Custom Docker image requires root

Custom Docker containers must be configured to start as the root user when used with Databricks....

Job fails due to cluster manager core instance request limit

Learn how to troubleshoot Databricks errors related to API rate limits....

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....

Failed to expand the EBS volume

Learn how to set the correct permissions on AWS EC2 to enable EBS volume expansion....

EBS leaked volumes

Learn how to handle leaked EBS volumes that are not automatically deleted....

Log delivery fails with AssumeRole

You get an access denied error when you try to use `AssumeRole` to send cluster logs to a S3 bucket in another account....

Multi-part upload failure

Learn how to resolve a multi-part upload failure....

Persist Apache Spark CSV metrics to a DBFS location

Persist Spark CSV metrics to a sink in a DBFS location....

Replay Apache Spark events in a cluster

Use a single node cluster to replay another cluster's event log in the Spark UI....

S3 connection fails with "No role specified and no roles available"

Databricks Utilities (dbutils) fails with a role error when IAM Role Passthrough and an Instance Profile are both enabled....

Set Apache Hadoop core-site.xml properties

Set Apache Hadoop core-site.xml properties in a Databricks cluster....

Set executor log level

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

Set instance_profile_arn as optional with a cluster policy

Use a cluster policy to set the AWS attribute instance_profile_arn as optional....

Apache Spark job doesn’t start

Learn how to troubleshoot a Databricks Spark job that won't start....

Auto termination is disabled when starting a job cluster

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

Unexpected cluster termination

Learn how to troubleshoot a Databricks cluster that stopped unexpectedly....

How to configure single-core executors to run JNI libraries

Learn how to configure single-core executors to run JNI libraries on Databricks....

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....

Apache Spark UI shows less than total node memory

Learn what to do when the Spark UI shows less memory than is actually available on the node....

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 read audit logs due to duplicate columns

Case-sensitive parameter names cause a duplicate column error when reading audit logs....

Cannot set a custom PYTHONPATH

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

Use iptables to access the EC2 metadata server

You must setup custom iptables rules in order to access the EC2 metadata server. You cannot access it by default....

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....

Use audit logs to identify who deleted a cluster

You can use audit logs to identify who deleted a cluster configuration....

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....

R commands fail on custom Docker cluster

R version 4.2.0 changed the way Renviron.site is initialized, so you must set an environment variable when using custom Docker clusters....

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....

Legacy global init script migration notebook

Easily migrate your legacy global init scripts to the current global init script framework....

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....

VcpuLimitExceeded error when creating a GPU ML cluster

You need to increase the vCPU capacity in your AWS account....

Shorten cluster provisioning time by using Docker containers

Learn how to speed up cluster provisioning by using Docker container services...

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...

Failure to start AWS clusters with c5.2xlarge instance type

Contact AWS support if you cannot start clusters with the c5.2xlarge instance type....

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. ...

[ISOLATION_STARTUP_FAILURE] in shared clusters with Databricks Runtime 14.3 LTS - 15.4 LTS

Leverage an assigned cluster or revert to a custom Databricks Runtime release version as interim solutions....

UDF functions not supported error in Unity Catalog

Rewrite UDFs in Python or SQL, otherwise use single user clusters where Java UDFs are supported....

Ganglia metrics not appearing in historical metrics snapshots list

Configure the collection period, or update Databricks Runtime to at least 13.0 to use Compute metrics instead. ...

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. ...

"Security Daemon Registration Exception" error when trying to create a compute cluster in AWS workspaces

Ensure you have correctly created and set up a VPC endpoint, regional STS endpoints, and your network allows communication. ...

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....

403 AccessDenied error when writing cluster delivery logs

Use the clusters API to apply KMS encryption for cluster logs. ...

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....

Cluster startup fails after installing awswrangler 3.10.0

Revert to a previous version of awswrangler library....

Compute clusters get an authorization failure when cluster tags are used

If you use custom tags and instance pools, set the tags at the pool level....

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. ...

Clusters using Docker databricksruntime:latest tag are not starting

Replace latest tag with LTS for Databricks Docker image....

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....

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....

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....

How to dump tables in CSV, JSON, XML, text, or HTML format

Learn how to output tables from Databricks in CSV, JSON, XML, text, or HTML format....

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....

Job fails when using Spark-Avro to write decimal values to AWS Redshift

Learn how to resolve job failures when writing decimal values to AWS Redshift with Spark-Avro....

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....

Access denied when writing to an S3 bucket using RDD

Learn how to resolve an access denied error when writing to an S3 bucket using RDD....

Invalid timestamp when loading data into Amazon Redshift

Learn how to resolve an invalid timestamp error when loading data into AWS Redshift....

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....

Object ownership is getting changed on dropping and recreating tables

Use TRUNCATE or REPLACE for tables and ALTER VIEW for views instead of dropping and recreating them....

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. ...

Create tables on JSON datasets

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

Delete table when underlying S3 bucket is deleted

Do not delete the contents of a S3 bucket before dropping a table that stores data in the bucket....

Failure when mounting or accessing Azure Blob storage

Learn how to resolve a failure when mounting or accessing Azure Blob storage from Databricks....

Unable to read files and list directories in a WASB filesystem

Learn how to interpret errors that occur when accessing WASB append blob types in Databricks....

Optimize read performance from JDBC data sources

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

Troubleshooting JDBC/ODBC access to Azure Data Lake Storage Gen2

Learn how to troubleshoot JDBC and ODBC access to Azure Data Lake Storage Gen2 from Databricks....

CosmosDB-Spark connector library conflict

Learn how to resolve conflicts that arise when using the CosmosDB-Spark connector library with 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...

Apache Spark JDBC datasource query option doesn’t work for Oracle database

Learn how to resolve an error that occurs when using the Apache Spark JDBC datasource to connect to Oracle Database from Databricks....

Accessing Redshift fails with NullPointerException

Learn how to resolve a `NullPointerException` error that occurs when you read a Redshift table....

Redshift JDBC driver conflict issue

Learn how to resolve a Redshift JDBC SQLDriverWrapper driver conflict....

ABFS client hangs if incorrect client ID or wrong path used

Trying to access an Azure Blob File System (ABFS) path results in a hung command when using Azure Data Lake Storage Gen2 (ADLS)....

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....

Apache Spark reading .gzip files from S3 instead of decompressed data

Rename the files in S3 from .gzip to .gz....

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. ...

Databricks jobs using AWS Glue Data Catalog failing due to inability to reach cluster drivers

Ensure the Databricks cluster's IAM role has necessary permissions to access AWS Glue Data Catalog, update the IAM policy, and restart the cluster....

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

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

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....

Cannot access objects written by Databricks from outside Databricks

Learn how to resolve a HeadObject operation error and access objects written by Databricks from outside Databricks....

Cannot read Databricks objects stored in the DBFS root directory

Learn what to do when you cannot read Databricks objects stored in the DBFS root directory....

How to calculate the Databricks file system (DBFS) S3 API call cost

Learn how to calculate the Databricks file system (DBFS) S3 API call cost....

How to specify the DBFS path

Learn how to specify the DBFS path in Apache Spark, Bash, DBUtils, Python, and Scala....

Operation not supported during append

...

Parallelize filesystem operations

Parallelize Apache Spark filesystem operations with DBUtils and Hadoop FileUtil; emulate DistCp....

S3 connection reset error

Apache Spark job fails with S3 connection reset error....

Upload large files using DBFS API 2.0 and PowerShell

Use PowerShell and the DBFS API to upload large files to your Databricks workspace....

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....

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. ...

Databricks SQL ANSI enablement guide

Learn how to enable ANSI SQL for your existing Databricks workloads....

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

...

Redshift queries using Lakehouse Federation taking longer than expected

Make JDBC fetchsize adjustments or use the COPY UNLOAD method....

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. ...

Apache Spark session is null in DBConnect

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

Databricks Connect reports version error with Databricks Runtime 6.4

...

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....

How to Sort S3 files By Modification Time in Databricks Notebooks

...

Invalid Access Token error when running jobs with Airflow

Learn what to do when you receive an Invalid Access Token error when using Databricks jobs with Airflow....

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....

AWS Lambda multiprocessing.ThreadPool function issue when using db-connect 14 and 15 in Databricks

Use db-connect 16 in Databricks....

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....

Cannot delete data using JDBC in Eclipse

Delete operations on a Delta table fail with a SparkJDBCDriver error when using JDBC in an Eclipse local environment....

Compare two versions of a Delta table

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

Converting from Parquet to Delta Lake fails

Converting a file from Parquet to Delta Lake fails with a partition error when you have a subdirectory. Expecting 0 partition column(s), but found 1 partition column(s)...

Delta Merge cannot resolve nested field

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

Delete your streaming query checkpoint and restart

Delta table doesn't exist. Please delete your streaming query checkpoint and restart....

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....

HIVE_CURSOR_ERROR when reading a table in Athena

When you try to read a table in Athena, the select query returns a HIVE_CURSOR_ERROR message....

Access denied when writing Delta Lake tables to S3

Learn how to resolve an access denied 403 Forbidden error when writing Delta Lake tables to S3....

Delta Lake write job fails with java.lang.UnsupportedOperationException

Learn how to prevent java.lang.UnsupportedOperationException in Delta Lake write jobs....

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

...

Object lock error when writing Delta Lake tables to S3

Delta Lake does not support S3 buckets with object lock enabled. com.amazonaws.services.s3.model.AmazonS3Exception...

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....

Delta Lake UPDATE query fails with IllegalState exception

Learn how to resolve an issue with Delta Lake UPDATE, DELETE, or MERGE queries that use Python UDFs....

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....

The delta.retentionDurationCheck property is not recognized when using serverless compute

Use VACUUM or table properties to handle retention instead. ...

"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....

VACUUM operations not performing even after enabling predictive optimization

Create a new deletion operation to trigger VACUUM after enabling predictive optimization....

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....

Slow S3 API responses when using Delta Lake with versioning-enabled S3 buckets

Disable S3 bucket versioning....

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....

Error when trying to perform maintenance on a Delta table

Avoid manual maintenance, or disable predictive optimization if manual maintenance is necessary....

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....

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....

Create table in overwrite mode fails when interrupted

Learn how to troubleshoot failures that occur when you rerun an Apache Spark write operation by cancelling the currently running job....

Apache Spark Jobs hang due to non-deterministic custom UDF

Learn what to do when your Apache Spark job hangs due to a non-deterministic custom UDF....

Apache Spark job fails with Failed to parse byte string

Apache Spark job fails with a Failed to parse byte string error....

Apache Spark UI shows wrong number of jobs

Apache Spark UI shows the wrong number of active jobs....

Apache Spark job fails with a Connection pool shut down error

Apache Spark job fails with a java.lang.IllegalStateException: Connection pool shut down error....

Job fails with atypical errors message

Job run is throttled and fails due to observing atypical errors message....

Apache Spark job fails with maxResultSize exception

Learn what to do when an Apache Spark job fails with a maxResultSize exception....

Databricks job fails because library is not installed

Learn how to prevent Databricks jobs from failing due to uninstalled libraries....

Job failure due to Azure Data Lake Storage (ADLS) CREATE limits

Learn what to do when your Databricks job fails due to Azure Data Lake Storage CREATE 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....

How to ensure idempotency for jobs

Learn how to ensure that jobs submitted through the Databricks REST API aren't duplicated if there is a retry after a request times out....

Streaming job has degraded performance

Streaming job has poor performance after stopping and restarting from same checkpoint....

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....

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....

Increase the number of tasks per stage

Learn how to increase the number of tasks per stage when using the spark-xml package with Databricks....

Maximum execution context or notebook attachment limit reached

Learn what to do when the maximum execution context or notebook attachment limit is reached in Databricks....

Serialized task is too large

Learn what to do when a serialized task is too large in Databricks....

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....

Recurring error “Unable to get field from serde” when trying to perform operations on table

Verify your metadata using the Glue API, then recreate or update the table with the correct metadata. ...

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....

Cannot import module in egg library

The module in the egg library cannot be imported. Easy install, Python....

Cannot import TabularPrediction from AutoGluon

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

Latest PyStan fails to install on Databricks Runtime 6.4

PyStan 3 doesn't install on Databricks Runtime 6.4 ES....

Library unavailability causing job failures

Learn how to resolve Databricks job failures caused by unavailable libraries....

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....

Libraries failing due to transient Maven issue

Library resolution failed. Cannot download some libraries due to transient Maven issue....

New job fails when adding a library from DBFS or S3

New jobs fail when adding a library from DBFS or S3 storage. Error Uncaught TypeError Cannot read property 'concat' of undefined...

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 instead of installing a library directly....

Error during Maven library installation: ERROR_MAVEN_LIBRARY_RESOLUTION

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

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....

Error when importing OneHotEncoderEstimator

You get an error message when trying to import OneHotEncoderEstimator....

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...

Errors when accessing MLflow artifacts without using the MLflow client

Resolve errors when attempting to access MLflow artifacts without using the MLflow client...

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....

Python commands fail on Machine Learning clusters

Python commands are failing on Databricks Runtime for Machine Learning clusters. Conda....

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....

MLflow 'invalid access token' error

Long running ML tasks require an access token with an extended lifetime to ensure the tasks complete before the token expires....

Unable to update a serving endpoint even with necessary permissions

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

Vector search index contains incorrect number of rows

Ensure that the Delta table has a unique primary key....

ModuleNotFoundError: No module named 'packaging' when creating GPU Model Serving endpoint

Add pip_requirements during model logging. ...

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....

Disable or restrict access to the foundation model APIs

Set rate limits to zero....

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....

TABLE_ONLINE_VECTOR_INDEX_REPLICA does not support Lakehouse Federation

Use the Python SDK or the REST API for querying a vector search endpoint. ...

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. ...

MLflow models saving to local path when registered instead of to the desired registry

Databricks recommends managing your model lifecycle in Unity Catalog....

“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....

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....

How to create table DDLs to import into an external metastore

Learn how to export all table metadata from Hive to an external metastore from Databricks....

Drop tables with corrupted metadata from the metastore

Learn how to drop tables that contain corrupted metadata from a metastore....

Error in CREATE TABLE with external Hive metastore

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

AnalysisException when dropping table on Azure-backed metastore

Learn how to overcome an AnalysisException when dropping a table on an Azure-backed metastore....

How to troubleshoot several Apache Hive metastore problems

Learn how to troubleshoot Apache Hive metastore problems....

Listing table names

Learn how to list table names in Databricks....

How to set up an embedded Apache Hive metastore

Learn how to set up an embedded Apache Hive metastore with Databricks....

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....

Failed to create query error when upgrading external metastore to Unity Catalog

The "Create query for upgrade" command only works when run on a warehouse in Data Explorer....

Databricks updates Glue Data Catalog during read/write operations

Upgrade to Unity Catalog. As an interim solution, turn off delta.catalog.update in Databricks....

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....

How to explore Apache Spark metrics with Spark listeners

Learn how to explore Apache Spark metrics using Spark listeners with Databricks....

How to use Apache Spark metrics

Learn how to use Apache Spark metrics with Databricks....

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

Databricks recommends using audit log system tables. ...

Access S3 with temporary session credentials

Extract IAM session credentials and use them to access S3 storage via S3A URI. Requires Databricks Runtime 8.3 and above....

Cannot use IAM roles with table ACL

You cannot obtain IAM credentials when table ACLs are enabled because access to the EC2 instance metadata service is blocked....

Enable s3cmd for notebooks

Use an init script to enable s3cmd for use in notebooks....

How to check if a spark property is modifiable in a notebook

Learn how to modify Spark properties in a Databricks notebook....

JSON reader parses values as null

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

Common errors in notebooks

Learn about common errors from Databricks notebooks....

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....

Access notebooks owned by a deleted user

How to access Databricks notebooks owned by a deleted user....

Notebook autosave fails due to file size limits

Learn what to do when your Databricks notebook fails to autosave due to file size limits....

How to send email or SMS messages from Databricks notebooks

Learn how to send an email from your Databricks notebook....

Troubleshooting unresponsive Python notebooks or canceled commands

Learn how to troubleshoot unresponsive Python notebooks and cancelled commands in Databricks notebooks....

Update job permissions for multiple users

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

Service principal cannot create access token

You cannot create a token on behalf of a service principal with the API when token usage is disabled....

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. ...

Forbidden error while accessing S3 data

...

Table creation fails with security exception

Learn what to do when table creation fails with a security exception....

Connection retries take a long time to fail

The default Apache Hadoop values for connection timeout and retry are high, reduce the values for quicker failures....

Search audit logs for connections from prohibited IP addresses

Use audit logs to review and validate connection attempts to your workspace....

"Unable to update Group Push mapping target" error when syncing Okta groups to workspace

You cannot SCIM sync users and groups directly to the workspace when identity federation is enabled....

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....

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 set up Apache Kafka on Databricks

Learn how to set up Apache Kafka on Databricks....

Handling partition column values while using an SQS queue as a streaming source

...

How to restart a structured streaming query from last written offset

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

How to switch a SNS streaming job to a new SQS queue

...

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....

Stream XML files using an auto-loader

Stream XML files on Databricks by combining the auto-loading features of the Spark batch API with the OSS library Spark-XML....

Streaming job using Kinesis connector fails

A streaming job writing to a Kinesis sink fails with out of memory error because HTTP clients are not getting terminated....

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. ...

Incorrect numInputRows values even with row limits set per batch

Use endOffset instead of latestOffset to calculate the number of records read. ...

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)....

DatabricksS3LoggingException errors while attempting to read a binary file in an Apache Spark structured streaming job

Disable the delta format check and ensure correct IAM role setup. ...

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....

Auto Loader job fails saying metadata file is missing from checkpoint directory

Recover or recreate the missing metadata file, and then ensure the checkpoint location is not in a bucket with a lifecycle policy enabled. ...

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....

Error when trying to run an Auto Loader job that uses cloudFiles

Set spark.databricks.cloudFiles.checkSourceChanged to false....

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....

How to save Plotly files and display From DBFS

Learn how to save Plotly files and display them from DBFS....

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....

Install and compile Cython

Learn how to install and compile Cython with Databricks....

Reading large DBFS-mounted files using Python APIs

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

Use the HDFS API to read files in Python

Learn how to read files directly by using the HDFS API in Python....

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....

Load special characters with Spark-XML

Special characters are not rendering correctly. Use charset with Spark-XML....

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....