Cannot access objects written by Databricks from outside Databricks
Problem When you attempt to access an object in an S3 location written by Databricks using the AWS CLI, the following error occurs: ubuntu@0213-174944-clean111-10-93-15-150:~$ aws s3 cp s3://<bucket>/<location>/0/delta/sandbox/deileringDemo__m2/_delta_log/00000000000000000000.json . fatal error: An error occurred (403) when calling the H...
Cannot read Databricks objects stored in the DBFS root directory
Problem An Access Denied error returns when you attempt to read Databricks objects stored in the DBFS root directory in blob storage from outside a Databricks cluster. Cause This is normal behavior for the DBFS root directory. Databricks stores objects like libraries and other temporary system files in the DBFS root directory. Databricks is the only...
How to calculate the Databricks file system (DBFS) S3 API call cost
The cost of a DBFS S3 bucket is primarily driven by the number of API calls, and secondarily by the cost of storage. You can use the AWS CloudTrail logs to create a table, count the number of API calls, and thereby calculate the exact cost of the API requests. Obtain the following information. You may need to contact your AWS Administrator to get it...
How to specify the DBFS path
When working with Databricks you will sometimes have to access the Databricks File System (DBFS). Accessing files on DBFS is done with standard filesystem commands, however the syntax varies depending on the language or tool used. For example, take the following DBFS path: dbfs:/mnt/test_folder/test_folder1/ Apache Spark Under Spark, you should spec...
Operation not supported during append
Problem You are attempting to append data to a file saved on an external storage mount point and are getting an error message: OSError: [Errno 95] Operation not supported. The error occurs when trying to append to a file from both Python and R. Cause Direct appends and random writes are not supported in FUSE v2, which is available in Databricks Runt...
Parallelize filesystem operations
DBR Version: <list all applicable DBR versions> Cloud Version: AWS, Azure Author: sandeep.chandran@databricks.com Owning Team: <Region + Platform/Spark> Ticket URL: <Link to original Salesforce or Jira ticket> Last reviewed date: July 21, 2021 - Ashish Singh When you need to speed up copy and move operations, parallelizing them is ...
S3 connection reset error
Problem Your Apache Spark job fails when attempting an S3 operation. The error message Caused by: java.net.SocketException: Connection reset appears in the stack trace. Example stack trace from an S3 read operation: Caused by: javax.net.ssl.SSLException: Connection reset; Request ID: XXXXX, Extended Request ID: XXXXX, Cloud Provider: AWS, Instance I...
Upload large files using DBFS API 2.0 and PowerShell
Using the Databricks REST API to interact with your clusters programmatically can be a great way to streamline workflows with scripts. The API can be called with various tools, including PowerShell. In this article, we are going to take a look at an example DBFS put command using curl and then show you how to execute that same command using PowerShe...