Troubleshooting
For troubleshooting articles. Predominantly problem / error, and workaround / solution.
- Unable to access VDS even with the granted Privileges (v21+)
- MS SQL Server Sources Failing with PKIX Certificate Error After Upgrading to Dremio v25.2.25
- SQL Server Collation Pushdown Performance Regression in Dremio 25.2.18
- Dell ECS S3 Source Shows "bucket is null/empty" Error in Dremio UI
- Unable to Connect to Hive Source – Certificate Mismatch on Hive Metastore Host
- System Tables (sys.) and Basic queries Failing with NullPointerException
- Dremio UI Unusable after Upgrade INTERNAL: Encountered end-of-stream mid-frame
- OUT_OF_MEMORY ERROR with Unable to allocate buffer of size "dremio-client-connections"
- UNPIVOT Function Returns Fewer Rows or Columns Than Expected in Dremio
- Update Object Ownership Using Dremio API is not updating.
- Exception when using “TZH:TZM” format
- ArrowFlightJDBC fails with UNAVAILABLE: Network closed for unknown reason
- Unable to connect to a PostgreSQL database via Dremio but local pgadmin commands are successful.
- PYArrow error - Exception has occurred: FlightInternalError Could not finish writing before closing
- Datetime Format Parsing (Stricter Enforcement) in DC-209/ DC-211
- MongoDB “Field Names Are Case Insensitive” Option in Dremio
- Enabling SSO authentication for Dremio web console prevents username and password login for Tableau Desktop Dremio connector
- Resolving IAM Permissions Error for iam:PassRole in Dremio Cloud
- error while starting Dremio: java.lang.UnsatisfiedLinkError: /tmp/librocksdbjniXXXXXX.so: failed to map segment from shared object
- Reflection on view is substituted in query against a physical dataset
- Power BI fails to connect to Dremio with error "access_denied: AADSTS650057: Invalid resource."
- Error: ArrowFlight Connection RPC Timeout
- IllegalArgumentException: The argument ''destTz' of function 'convert_timezone' has to be constant!
- SSO with OIDC provider fails with "unable to find valid certification path to requested target"
- Unable to pull Dremio Enterprise Images from Quay.io: manifest unknown / connection refused
- Backup process fails with "unable to find valid certification path to requested target" exception
- Promoted Parquet files being Processed with ICEBERG_SUB_SCAN instead of PARQUET_ROW_GROUP_SCAN
- Error: “Tabular UDFs must not be correlated” When Creating a Function
- May 2025 PowerBi update issue (Cannot convert the value null to type Record)
- Corrupted Zookeeper Transaction Log Due to Full Filesystem