ORA-31649: Master process string violated startup protocol
Cause: The master 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. Check the trace log for the failed process to see if there is any 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
https://support.oracle.com/
http://www.oracle.com/