Memory Leak in WebLogic At Weblogic.Rjvm.ConnectionManagerServer (Doc ID 2227869.1)

Last updated on AUGUST 10, 2017

Applies to:

Oracle WebLogic Server - Version 12.2.1.0.0 to 12.2.1.2.0 [Release 12c]
Information in this document applies to any platform.

Symptoms

On WebLogic Server 12.2.1.0.0 a memory leak is observered at weblogic.rjvm.ConnectionManagerServer

Below behavior is noted :- 

1. WebLogic JVM young generation and old generation size continues to grow, with verbosegc logs and restart the Weblogic servers is needed to clear this.

2. Analysis of HeapDump from problem server show that multiple instances of “weblogic.rjvm.ConnectionManagerServer”, loaded by “sun.misc.Launcher$AppClassLoader” occupying the max memory


Example:

1,134 instances of "weblogic.rjvm.ConnectionManagerServer", loaded by "sun.misc.Launcher$AppClassLoader @ 0x6c0007ab0" occupy 2,166,945,856 (73.96%) bytes. These instances are referenced from one instance of "weblogic.utils.collections.ConcurrentWeakHashMap$Segment[]", loaded by "sun.misc.Launcher$AppClassLoader @ 0x6c0007ab0"

 

 

Changes

 

Cause

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