[jira] [Created] (IGNITE-8775) Memory leak in ignite-cassandra module while using RoundRobinPolicy LoadBalancingPolicy

[Anton Vinogradov (Jira)]

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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