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Support Article

Issue Running Extracts at same time via pxExtractDataWithArgs



Agents are scheduled to run different Extracts using the pxExtractDataWithArgs activity at the same time. When this is done, not all of the extract manifest files are produced as expected. There are also unique constraint errors seen in the logs.

Error Messages

2016-02-19 13:07:02,437 [.PegaWorkManager : 8] [ ] [Application:01.01.01] ( internal.access.ExtractImpl) ERROR - Error while getting the sequenceNumberORA-00001: unique constraint (YourDataSchema.PR_LOG_PK) violated

Steps to Reproduce

Create multiple Extract rules.
Schedule agents to run these extracts at the same time using the pxExtractDataWithArgs activity.

Root Cause

A defect in Pegasystems’ code or rules causes this issue. The use of static variables in the code resulted in the unexpected behavior.


Apply Hfix-25845, but note Hfix-25845 does not address the unique constraint error which occurs because the extracts are running at the same time and an entry is added to the pr_log table when each extract starts. The pzInsKey for two extracts that run at the same time is identical, thus leading to this error. To avoid this, stagger the start times of the extracts.

Published March 16, 2016 - Updated October 8, 2020

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