[infinispan-issues] [JBoss JIRA] (ISPN-6375) Metaspace memory leak with infinispan

[Andrej Dmitrenko (JIRA)]

Andrej Dmitrenko created ISPN-6375:
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             Summary: Metaspace memory leak with infinispan
                 Key: ISPN-6375
                 URL: https://issues.jboss.org/browse/ISPN-6375
             Project: Infinispan
          Issue Type: Feature Request
          Components: Core
    Affects Versions: 8.1.2.Final
            Reporter: Andrej Dmitrenko
         Attachments: memory-analyzer.png

I use infinispan for embedded cache and criteria query in cache. It is works great!
I start infinispan in my application and call embeddedCacheManager.stop() at application destroy.
I run my application in oracle weblogic 12.1.3 server. And after redeploy my application I see metaspace memory leak.
I have checked heap dump in memory analizer.
The cause in thread local variable threadCounterHashCode in org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8$CounterHashCode class
After undeploy aplication there is a thread which keep thread local reference to threadCounterHashCode, and threadCounterHashCode  keep link to classloader and that's why classloader cannot be removed from metaspace memory.
I cannot control this thread.
I have got suggestion in forum to create ticket in JIRA (https://developer.jboss.org/message/952848)
Please do something with class org.infinispan.commons.util.concurrent.jdk8backported.EquivalentConcurrentHashMapV8$CounterHashCode to avoid metaspace memory leak in cases when user does not control thread pool 





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