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Support Article

JVM throws OOM due to pzSearchLucene



JVMs throws an Out-of-Memory condition or has high heap usage.

Heapdump analysis showed heap "consumed by 10 *large* instances of com.pegarules.generated.activity.ra_action_pzsearchlucene_4fc81aba9ab92fc5e218ba47947c4680$1$LuceneSearch "


Error Messages


Steps to Reproduce

The steps to reproduce this issue are not known.

Root Cause

User has a large index file about 48 GB.



PRPC 6.2 SP2 uses older version of Lucene which has internal cache issue.  

Since PRPC 6.3 SP1, newer version of  Lucene which has fixed the cache issue. 

​It is recommended to either upgrade to newer version of Lucene or PRPC or increase the max JVM heap to resolve the issue.

Suggest Edit

Published June 9, 2016 - Updated October 8, 2020

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