DataPump Export (EXPDP) Using A Network Link To A Standby Database Fails With Errors ORA-31626 ORA-31633 ORA-6512 ORA-16000
(Doc ID 805414.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Standard Edition - Version 184.108.40.206 to 220.127.116.11 [Release 11.1]
Information in this document applies to any platform.
***Checked for relevance on 11-Apr-2013***
DataPump export via a NETWORK_LINK fails with ORA-00600 
If you want to perform DataPump export on a physical standby database directly which is on read only mode, then you will not be able to do that, because DataPump Master Process cannot create the master table in a read only database. This master table is needed for any kind of operation. An export DataPump job from a read only database will therefore fail with:
The following errors could be presented in this scenario:
ORA-31626: job does not exist
ORA-31650: timeout waiting for master process response
ORA-00600: internal error code, arguments: , , , , , , , , , , , 
If you then try to export from a remote database via a network_link connected to the standby database, then you can run into
<Bug 7331929> - DATAPUMP EXPORT FROM STANDBY DATABASE FAILS ORA-16000
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