Troubleshooting
For troubleshooting articles. Predominantly problem / error, and workaround / solution.
- ERROR: "TypeError: MessageToJson() received an unexpected keyword argument 'including_default_value_fields'" while executing DBT Models to generate views in Dremio.
- ReflectionManager reports "DATA_READ ERROR: Failed to load results for job" for completed REFRESH REFLECTION job
- Query fails with: "Job was canceled because the query is too complex. Please simplify the query."
- Dremio error - Failed to decode column application::varchar - component - version: Dremio 25.0.x
- Kerberized source fails on Executors with "KrbException: krb5.conf loading failed."
- HOW TO: Manually Stop or Delete an Unresponsive Engine in Dremio
- java.security.GeneralSecurityException: Directory /opt/dremio/data/security is not accessible to owner only
- Logging changes after upgrading Kubernetes based installs to version 20 and beyond
- Oracle Data Source Shows Invalid “v$session.osuser” Property
- Metadata file errors after upgrading and enabling Apache Iceberg features
- VDS column change can cause unexpected error pop-up for reflections
- Conflicting functions with similar signatures error seen when upgrading
- Null Pointer Exception seen when promoting Delta Lake datasets
- pyodbc 4.0.34 breaks connectivity with Dremio ODBC
- AWSE project appears to hang when restoring
- AWSE deployments and correct disk mounts
- Dremio JVM not selecting the G1GC collector
- Dremio Cloud - "Scaling up the engine replicas failed, please check the engine scaling events page for more details"
- Dremio Cloud - S3 Source Connection Troubleshooting
- Auto generated self signed certificates and renewal
- UNSUPPORTED_OPERATION ERROR: Field [<fieldname>] has incompatible types in file and table.
- SYSTEM ERROR: HadoopIllegalArgumentException: Invalid buffer, not of length 635708
- OUT_OF_MEMORY_ERROR on Hash Joins - query execution - version 24
- Unable to set STATE parameter when using OpenID for SSO
- Setting Stack Size for queries failing with StackOverflowError
- Dremio coordinator fails to start after enabling Web Server Encryption on port 443
- Reflections not building after upgrading to v21 or beyond
- Dremio Cloud - "An unexpected error has occurred" or "Unable to communicate with Dremio" Errors
- Jobs failing with NessieReferenceConflictException "Retry-Failure during commit"
- Use of colon in S3 pathnames causes "Relative path in absolute URI" error