J2EE Application Using Coherence as Hibernate L2 Cache Leaks Memory on MapEvent And Eventually Fails With OOME

(Doc ID 1492669.1)

Last updated on FEBRUARY 24, 2017

Applies to:

Oracle Coherence - Version 3.7.1.5 and later
Information in this document applies to any platform.

Symptoms

In a WLS 10.3.6 environment with Coherence 3.7.1.5 using Coherence as a L2 Cache for Hibernate, there is an OOME (java.lang.OutOfMemoryError) reported after 3-4 days of operation. There is a very clear memory leak caused by com.tangosol.coherence.component.net.Member.

There are three instances of this class use 91% of the WLS heap. Each instance of com.tangosol.coherence.component.net.Member contains in turn around 20000 instances each of com.tangosol.coherence.component.util.daemon.queueProcessor , service , grid.partitionedService.PartitionedCache$MapEvent.

Cause

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