Radim Vansa created ISPN-2428: --------------------------------- Summary: ConcurrentModificationException in StateConsumerImpl Key: ISPN-2428 URL: https://issues.jboss.org/browse/ISPN-2428 Project: Infinispan Issue Type: Bug Components: State transfer Affects Versions: 5.2.0.Beta2 Reporter: Radim Vansa Assignee: Adrian Nistor In StateConsumerImpl.onTopologyUpdate(...) the transfersBySource.keySet() is iterated while under some conditions transfersBySource.remove(...) is called. As the iterated keySet is backed by the HashMap itself modifications during iteration are not permitted and I got {code} java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894) at java.util.HashMap$KeyIterator.next(HashMap.java:928) at org.infinispan.statetransfer.StateConsumerImpl.onTopologyUpdate(StateConsumerImpl.java:215) at org.infinispan.statetransfer.StateTransferManagerImpl.doTopologyUpdate(StateTransferManagerImpl.java:186) at org.infinispan.statetransfer.StateTransferManagerImpl.access$000(StateTransferManagerImpl.java:58) at org.infinispan.statetransfer.StateTransferManagerImpl$1.updateConsistentHash(StateTransferManagerImpl.java:117) at org.infinispan.topology.LocalTopologyManagerImpl.handleConsistentHashUpdate(LocalTopologyManagerImpl.java:194) at org.infinispan.topology.CacheTopologyControlCommand.doPerform(CacheTopologyControlCommand.java:165) at org.infinispan.topology.CacheTopologyControlCommand.perform(CacheTopologyControlCommand.java:137) at org.infinispan.topology.ClusterTopologyManagerImpl$3.call(ClusterTopologyManagerImpl.java:554) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira