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https://issues.apache.org/jira/browse/IGNITE-8775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yashasvi Kotamraju reassigned IGNITE-8775:
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Assignee: Igor Rudyak (was: Yashasvi Kotamraju)
> Memory leak in ignite-cassandra module while using RoundRobinPolicy
> LoadBalancingPolicy
> ---------------------------------------------------------------------------------------
>
> Key: IGNITE-8775
> URL: https://issues.apache.org/jira/browse/IGNITE-8775
> Project: Ignite
> Issue Type: Bug
> Components: cassandra
> Reporter: Yashasvi Kotamraju
> Assignee: Igor Rudyak
> Priority: Major
>
> OutOfMemory Exception is observed when encountered with the issue
> IGNITE-8354. Though the issue is solved, preventing OOM by preventing
> unnecessary refresh of Cassandra session refresh, there seems to be a memory
> leak in ignite-cassandra module while using RoundRobinPolicy
> LoadBalancingPolicy while refreshing cassandra session. which seems to be the
> root cause of OOM.
> In org.apache.ignite.cache.store.cassandra.session.CassandraSessionImpl.java
> when refresh() method is invoked to handle Exceptions, new Cluster is build
> with same LoadBalancingPolicy Object. We are using RoundRobinPolicy so same
> RoundRobinPolicy object would be used while building Cluster when refresh()
> is invoked. In RoundRobinPolicy there is a CopyOnWriteArrayList<Host>
> liveHosts. When ever init(Cluster cluster, Collection<Host> hosts) is called
> on RoundRobinPolicy it calls liveHosts.addAll(hosts) adding all the Host
> Object Collection to liveHosts.
> When ever Cluster is build during refresh() the Host Collection are added
> again to the liveHosts of the same RoundRobinPolicy that is used. Thus same
> Hosts are added again to liveHosts for every refresh() and the size would
> grow indefinitely after many refresh() calls causing OOM. Even in the heap
> dump post OOM we found huge number of Objects in liveHosts of
> RoundRobinPolicy Object.
> Some possible solutions would be
> 1. To use new LoadBalancingPolicy object while building new Cluster during
> refresh().
> 2. Somehow clear Objects in liveHosts during refresh().
>
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