We are seeing the following exception in the cluster node startup. Please note that this issue is sporadic.
This seems like race condition. the application on one node is calling evictAll() before the other node (throwing the exception) fully starts up and initializes the region.
2016-10-26 17:57:56,606 ERROR [OOB-18,shared=udp]-[org.infinispan.remoting.InboundInvocationHandlerImpl] ISPN000260: Exception executing command: java.lang.NullPointerException
at org.hibernate.cache.infinispan.util.EvictAllCommand.perform(EvictAllCommand.java:64)
at org.infinispan.remoting.InboundInvocationHandlerImpl.handleInternal(InboundInvocationHandlerImpl.java:95)
at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithWaitForBlocks(InboundInvocationHandlerImpl.java:186)
at org.infinispan.remoting.InboundInvocationHandlerImpl.handle(InboundInvocationHandlerImpl.java:84)
at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.executeCommandFromLocalCluster(CommandAwareRpcDispatcher.java:259)
at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:211)
at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:460)
at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:377)
at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:247)
at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:667)
at org.jgroups.blocks.mux.MuxUpHandler.up(MuxUpHandler.java:130)
at org.jgroups.JChannel.up(JChannel.java:708)
at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1015)
at org.jgroups.protocols.RSVP.up(RSVP.java:187)
at org.jgroups.protocols.FRAG2.up(FRAG2.java:165)
at org.jgroups.protocols.pbcast.GMS.up(GMS.java:1010)
at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:234)
at org.jgroups.protocols.UNICAST3.up(UNICAST3.java:391)
at org.jgroups.protocols.pbcast.NAKACK2.handleMessage(NAKACK2.java:774)
at org.jgroups.protocols.pbcast.NAKACK2.up(NAKACK2.java:570)
at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:147)
at org.jgroups.protocols.FD_ALL.up(FD_ALL.java:185)
at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:301)
at org.jgroups.protocols.MERGE3.up(MERGE3.java:303)
at org.jgroups.protocols.Discovery.up(Discovery.java:379)
at org.jgroups.protocols.TP$ProtocolAdapter.up(TP.java:2641)
at org.jgroups.protocols.TP.passMessageUp(TP.java:1429)
at org.jgroups.protocols.TP$MyHandler.run(TP.java:1615)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)