[infinispan-issues] [JBoss JIRA] Updated: (ISPN-1066) Partition merges when using topology hints can cause null pointers and leave the system in an unstable state

Partition merges when using topology hints can cause null pointers and leave the system in an unstable state ------------------------------------------------------------------------------------------------------------ Key: ISPN-1066 URL: https://issues.jboss.org/browse/ISPN-1066 Project: Infinispan Issue Type: Bug Components: Distributed Cache Affects Versions: 4.2.1.FINAL, 5.0.0.BETA2 Reporter: Manik Surtani Assignee: Manik Surtani Priority: Critical Labels: merge, split_brain Fix For: 4.2.2.BETA1, 5.0.0.CR1, 5.0.0.FINAL Due to a missing null check in MergeTask, and the way TopologyInfo instances are dealt with (inconsistently) in DistributionManagerImpl and ConsistentHash implementations. In this scenario, seen on the joining node: {code} Caused by: java.lang.NullPointerException at org.infinispan.distribution.DistributionManagerImpl.informRehashOnJoin(DistributionManagerImpl.java:475) at org.infinispan.commands.control.RehashControlCommand.perform(RehashControlCommand.java:134) at org.infinispan.remoting.InboundInvocationHandlerImpl.handleInternal(InboundInvocationHandlerImpl.java:145) at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithWaitForBlocks(InboundInvocationHandlerImpl.java:159) at org.infinispan.remoting.InboundInvocationHandlerImpl.handleWithRetry(InboundInvocationHandlerImpl.java:249) at org.infinispan.remoting.InboundInvocationHandlerImpl.handle(InboundInvocationHandlerImpl.java:131) at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.executeCommand(CommandAwareRpcDispatcher.java:159) at org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:144) at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:577) at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:488) at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:364) {code} and on the coordinator: {code} Caused by: java.lang.NullPointerException at org.infinispan.distribution.DistributionManagerImpl.rehash(DistributionManagerImpl.java:283) at org.infinispan.distribution.DistributionManagerImpl$ViewChangeListener.handleViewChange(DistributionManagerImpl.java:563) at sun.reflect.GeneratedMethodAccessor482.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.infinispan.notifications.AbstractListenerImpl$ListenerInvocation$1.run(AbstractListenerImpl.java:175) {code}