DataPump Export (EXPDP) Fails With Errors ORA-39079 ORA-25306 On One Node In A RAC Environment (Doc ID 948624.1)

Last updated on JULY 26, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.1.0.2 and later
Information in this document applies to any platform.
***Checked for relevance on 10-Feb-2015***

Symptoms

DataPump export on one certain RAC instance fails with errors:

ORA-39006: internal error
ORA-39065: unexpected master process exception in DISPATCH
ORA-39079: unable to enqueue message DG,KUPC$S_2_20090927001645,MCP, ,1,Y
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86
ORA-06512: at "SYS.KUPC$QUE_INT", line 924
ORA-25306: Cannot connect to buffered queue's owner instance

ORA-39097: Data Pump job encountered unexpected error -39079
ORA-39065: unexpected master process exception in KUPC$QUEUE_INT.PUT_STATUS
ORA-39079: unable to enqueue message DG,KUPC$S_2_20090927001645,MCP, ,1,Y
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86
ORA-06512: at "SYS.KUPC$QUE_INT", line 924
ORA-25306: Cannot connect to buffered queue's owner instance

The same export runs fine from the other instances in the cluster.

Cause

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