05:43:56,513 WARN  [org.infinispan.topology.CacheTopologyControlCommand] (notification-thread-0) ISPN000071: Caught exception when handling command CacheTopologyControlCommand{cache=default-host/clusterbench, type=CH_UPDATE, sender=perf21/web, joinInfo=null, topologyId=23, currentCH=DefaultConsistentHash{numSegments=80, numOwners=2, members=[perf21/web, perf18/web, perf19/web]}, pendingCH=null, throwable=null, viewId=8}: java.lang.IllegalArgumentException: The task is already cancelled.
 	at org.infinispan.statetransfer.InboundTransferTask.cancelSegments(InboundTransferTask.java:167)
 	at org.infinispan.statetransfer.StateConsumerImpl.cancelTransfers(StateConsumerImpl.java:774)
 	at org.infinispan.statetransfer.StateConsumerImpl.onTopologyUpdate(StateConsumerImpl.java:314)
 	at org.infinispan.statetransfer.StateTransferManagerImpl.doTopologyUpdate(StateTransferManagerImpl.java:195)
 	at org.infinispan.statetransfer.StateTransferManagerImpl.access$000(StateTransferManagerImpl.java:61)
 	at org.infinispan.statetransfer.StateTransferManagerImpl$1.updateConsistentHash(StateTransferManagerImpl.java:121)
 	at org.infinispan.topology.LocalTopologyManagerImpl.handleConsistentHashUpdate(LocalTopologyManagerImpl.java:202)
 	at org.infinispan.topology.CacheTopologyControlCommand.doPerform(CacheTopologyControlCommand.java:165)
 	at org.infinispan.topology.CacheTopologyControlCommand.perform(CacheTopologyControlCommand.java:137)
 	at org.infinispan.topology.ClusterTopologyManagerImpl.executeOnClusterSync(ClusterTopologyManagerImpl.java:540)
 	at org.infinispan.topology.ClusterTopologyManagerImpl.broadcastConsistentHashUpdate(ClusterTopologyManagerImpl.java:332)
 	at org.infinispan.topology.ClusterTopologyManagerImpl.updateCacheStatusAfterMerge(ClusterTopologyManagerImpl.java:319)
 	at org.infinispan.topology.ClusterTopologyManagerImpl.handleNewView(ClusterTopologyManagerImpl.java:236)
 	at org.infinispan.topology.ClusterTopologyManagerImpl$ClusterViewListener.handleViewChange(ClusterTopologyManagerImpl.java:579)
 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_43]
 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_43]
 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_43]
 	at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_43]
 	at org.infinispan.notifications.AbstractListenerImpl$ListenerInvocation$1.run(AbstractListenerImpl.java:212)
 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) [rt.jar:1.6.0_43]
 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) [rt.jar:1.6.0_43]
 	at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_43]