How it started.
one of our Process Server farm was crashing after generating lots of heap dumps. CPU usage was almost 100% continuously and AppTarget Node ran out of heap. This is for 7.5.1.0 version.
Investigation
Using the IBM Heap Analyzer tool, we observed that we had a single instance of com.lombardisoftware.server.ejb.persistence.versioning.BranchManager worth of 4GB+
Using the IBM Heap Analyzer tool, we observed that we had a single instance of com.lombardisoftware.server.ejb.persistence.versioning.BranchManager worth of 4GB+
After some digging we found below iFix.
JR42522: BusinessDataAliasCache performance and memory leak fix for IBM Business Process Manager
Solution::
Upgrade to 7.5.1.1(we took this road) or install iFix provided in above link
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