Yashasvi Kotamraju created IGNITE-8775:
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Summary: 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
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.
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