Common issues

This section lists some common issues encountered in DSS and associated solutions and tips.

• DSS does not start / Cannot connect
  • Check processes state
  • Verify local connectivity
  • DSS start (or stop) fails
    • Server port already in use
    • Server requires authentication
  • Kill all DSS processes
  • Diagnose process failures
• Cannot login to DSS
  • You are using the Dataiku Cloud Trial
  • You are using DSS Free Edition
  • You are using DSS Enterprise Edition
  • Your credentials don’t work
  • Resetting a forgotten DSS password
    • If you still have access to DSS
    • If you have lost all access to DSS
• DSS crashes / The “Disconnected” overlay appears
• Websockets problems
  • I am seeing the “Could not establish WebSocket connection” message
    • Causes
    • Consequences
    • Remedies
• Cannot connect to a SQL database
• A job fails
  • Source dataset is not ready
  • Dataset is already being built
  • One of the recipes failed
  • Getting a job diagnosis
• A scenario fails
  • One “build” step failed
  • Getting a scenario diagnosis
• A ML model training fails
  • MemoryError (In-memory training only)
  • Process died (killed - maybe out of memory)
• “Your user profile does not allow” issues
  • If you are a DSS administrator
  • If you are not a DSS administrator
• Receiving “java.lang.NoClassDefFoundError”
  • Receiving “java.lang.NoClassDefFoundError: org/apache/hadoop/”
    • Resolution
  • Receiving java.lang.NoClassDefFoundError for operations that previously did not throw an error
    • Resolution
• The server selected protocol version TLS10 is not accepted by client preferences [TLS12]
  • Resolution