BRMS throws an OOME with heap retention in ksession objects

Solution Unverified - Updated

Environment

  • BRMS 5

Issue

  • BRMS hit an OOME. The heap dump showed most of the heap used by session objects referenced by a ReteooRuleBase object, which stored the sessions in its statefulSessions map.

Resolution

  • Be sure that kSessions are disposed. Ideally, they should be disposed in a finally clause to ensure no prior exceptions could cause it to be skipped.

Root Cause

  • The sessions were not disposed. They will persist in this map until disposed.
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