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Troubleshooting

For troubleshooting articles. Predominantly problem / error, and workaround / solution.

  • Verify Ranger Policies on Dremio Coordinator
  • ALTER Session is not applied when downloading data
  • Unable to format any PDS on a specific Source: "Unexpected Error occured"
  • ERROR ROOT - Dremio is exiting. Failure while starting services. org.rocksdb.RocksDBException: Can't access /######.sst
  • Why is nothing being logged to server.log ?
  • Failure while attempting to run instances. There are not enough free addresses in subnet <subnet-id> to satisfy the requested number of instances.
  • AWSE Engine Launch failed: not have sufficient <instance type> capacity in the Availability Zone you requested
  • Why does my Rest API SQL query return only 100 rows?
  • Unable to Configure and Browse ADLS Source with Azure AD Service Principal
  • Troubleshooting "Query was rejected based on a rule that did not specify a rejection reason."
  • Invalid properties blocking startup of AWSE instance
  • Dealing with "OUT_OF_MEMORY ERROR: Query was cancelled because it exceeded the memory limits set by the administrator. Expected at least XXX GB bytes, but only had XXX available."
  • Dremio Cloud - EC2 System Logs and Dremio Node Diagnostics Results
  • Use of colon in S3 pathnames causes "Relative path in absolute URI" error
  • Jobs failing with NessieReferenceConflictException "Retry-Failure during commit"
  • Dremio Cloud - Error: The engine 'preview' has been deleted
  • Dremio Cloud - "An unexpected error has occurred" or "Unable to communicate with Dremio" Errors
  • Arrow Flight Driver Install Failure on MacOS
  • Reflections not building after upgrading to v21 or beyond
  • When deploying with dremio helm chart Zookeeper image fills up disk in kubernetes
  • Dremio coordinator fails to start after enabling Web Server Encryption on port 443
  • Setting Stack Size for queries failing with StackOverflowError
  • Unable to set STATE parameter when using OpenID for SSO
  • OUT_OF_MEMORY_ERROR on Hash Joins
  • SYSTEM ERROR: HadoopIllegalArgumentException: Invalid buffer, not of length 635708
  • UNSUPPORTED_OPERATION ERROR: Field [<fieldname>] has incompatible types in file and table.
  • Arrow Flight python example error "OSError: gRPC returned unavailable error..."
  • Auto generated self signed certificates and renewal
  • Dremio Cloud - "Scaling up the engine replicas failed, please check the engine scaling events page for more details"
  • Dremio JVM not selecting the G1GC collector
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