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https://issues.apache.org/jira/browse/CASSANDRA-2037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12986713#action_12986713
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Thibaut commented on CASSANDRA-2037:
------------------------------------
Created https://issues.apache.org/jira/browse/CASSANDRA-2054
> Unsafe Multimap Access in MessagingService
> ------------------------------------------
>
> Key: CASSANDRA-2037
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2037
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.7.0
> Reporter: Erik Onnen
> Priority: Critical
> Attachments: jstackerror.txt
>
>
> MessagingSerice is a system singleton with a static Multimap field targets.
> Multimaps are not thread safe but no attempt is made to synchronize access to
> that field. Multimap ultimately uses the standard java HashMap which is
> susceptible to a race condition where threads will get stuck during a get
> operation yielding multiple threads similar to the following stack:
> "pool-1-thread-6451" prio=10 tid=0x00007fa5242c9000 nid=0x10f4 runnable
> [0x00007fa52fde4000]
> java.lang.Thread.State: RUNNABLE
> at java.util.HashMap.get(HashMap.java:303)
> at
> com.google.common.collect.AbstractMultimap.getOrCreateCollection(AbstractMultimap.java:205)
> at
> com.google.common.collect.AbstractMultimap.put(AbstractMultimap.java:194)
> at
> com.google.common.collect.AbstractListMultimap.put(AbstractListMultimap.java:72)
> at
> com.google.common.collect.ArrayListMultimap.put(ArrayListMultimap.java:60)
> at
> org.apache.cassandra.net.MessagingService.sendRR(MessagingService.java:303)
> at
> org.apache.cassandra.service.StorageProxy.strongRead(StorageProxy.java:353)
> at
> org.apache.cassandra.service.StorageProxy.readProtocol(StorageProxy.java:229)
> at
> org.apache.cassandra.thrift.CassandraServer.readColumnFamily(CassandraServer.java:98)
> at
> org.apache.cassandra.thrift.CassandraServer.get(CassandraServer.java:289)
> at
> org.apache.cassandra.thrift.Cassandra$Processor$get.process(Cassandra.java:2655)
> at
> org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2555)
> at
> org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:167)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
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