ORA-39126 and ORA-12838: cannot read/modify an object after modifying it in parallel from Datapump Export (Doc ID 1558708.1)

Last updated on AUGUST 22, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.4 [Release 11.2]
Information in this document applies to any platform.
***Checked for relevance on 16-Dec-2014***

Symptoms

Performing datapump export and receiving errors:

Estimate in progress using BLOCKS method...

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.FETCH_XML_OBJECTS []
ORA-12838: cannot read/modify an object after modifying it in parallel
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 86
ORA-06512: at "SYS.KUPW$WORKER", line 8996

 

Cause

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