ORA-31674: worker process interrupt for unhandled exception in master process
Cause: A worker process was requested to clean up and exit because an unhandled exception occurred in the master process
Action: If this error occurs from a Data Pump client (e.g. expdp or impdp), it means that the master process for the operation had an unhandled exception. Check the log file for the operaton and the trace file for the master process for any additional information. Try the operation again. If the error occurs again, contact Oracle Customer Support and report the error
https://support.oracle.com/
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