Oracle Error Message
ORA-31690: Process name buffer size must be specified and must be greater than 0.
Reason for the Error
Called get worker exception and either specified NULL or 0 for the buffer size argument.
Solution
Be sure to specify a buffer size that is big enough to hold the worker process name (e.g. 30 bytes). If this error occurs from a Data Pump client (e.g. expdp or impdp), try the operation again. If the error occurs again, contact Oracle Customer Support and report the error.
