ORA-39108: Worker process [string] violated startup protocol. Worker error:
Cause: The worker process whose name is listed started up but then exited before notifying the creating process that it was finished with initialization.
Action: Refer to any following error messages for possible actions. Also, check the trace log for the failed process, if one was created, to see if there is any additional information about the failure. Correct the error, if possible, and try the operation again. If the error occurs again, contact Oracle Customer Support and report the error.