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From "Ming Vuong (Jira)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-12350) MVCC activated and causing memory leak (OOM) despite no mvccEnabled caches
Date Mon, 04 Nov 2019 02:45:00 GMT
Ming Vuong created IGNITE-12350:
-----------------------------------

             Summary: MVCC activated and causing memory leak (OOM) despite no mvccEnabled
caches
                 Key: IGNITE-12350
                 URL: https://issues.apache.org/jira/browse/IGNITE-12350
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 2.7.5
            Reporter: Ming Vuong
         Attachments: MATheap.jpg

We have a critical memory leak where mvccCoordinator is still selected and mvcc is still 'activated'
despite having no mvccEnabled caches, this is causing constant OOM crashes and issues on both
server and client nodes.

All client CacheAtomicityModes are of type ATOMIC, and for server config persistence is false,
TCPDiscoverySpi used and PeerClassLoadingEnabled=true.

There are two server JVM instances on two separate nodes. One of the servers consistently
get an OOM error, as well as all clients, due to the same recoveryBallotBoxes HashMap constantly
increasing in size and unable to be Garbage Collected.

Attached is Eclipse Memory Analyzer Tool screenshot on the heap dump close to one of the server
JVM OOM crashes. The same heap analysis result is apparent for all clients as well.

!MATheap.jpg!



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