[jboss-user] [JBoss Cache] - NullMarkerNodeForRemoval issue

[Thomas Heute]

Thomas Heute [http://community.jboss.org/people/thomas.heute%40jboss.com] created the discussion

"NullMarkerNodeForRemoval issue"

To view the discussion, visit: http://community.jboss.org/message/538849#538849

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The NullMarkerNodeForRemoval object introduced to solve the following issue:
 https://jira.jboss.org/jira/browse/JBCACHE-1493 https://jira.jboss.org/jira/browse/JBCACHE-1493

is generating a NPE:
java.lang.NullPointerException
     at org.jboss.cache.invocation.NodeInvocationDelegate.clearDataDirect(NodeInvocationDelegate.java:243)
     at org.jboss.cache.commands.write.ClearDataCommand.perform(ClearDataCommand.java:79)
     at org.jboss.cache.interceptors.CallInterceptor.invokeCommand(CallInterceptor.java:108)
     at org.jboss.cache.interceptors.CallInterceptor.handleAlterCacheMethod(CallInterceptor.java:173)
     at org.jboss.cache.interceptors.CallInterceptor.visitClearDataCommand(CallInterceptor.java:149)
     at org.jboss.cache.commands.write.ClearDataCommand.acceptVisitor(ClearDataCommand.java:86)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.EvictionInterceptor.visitClearDataCommand(EvictionInterceptor.java:235)
     at org.jboss.cache.commands.write.ClearDataCommand.acceptVisitor(ClearDataCommand.java:86)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.MVCCLockingInterceptor.handleClearDataCommand(MVCCLockingInterceptor.java:124)
     at org.jboss.cache.interceptors.base.PrePostProcessingCommandInterceptor.visitClearDataCommand(PrePostProcessingCommandInterceptor.java:167)
     at org.jboss.cache.commands.write.ClearDataCommand.acceptVisitor(ClearDataCommand.java:86)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.ReplicationInterceptor.handleCrudMethod(ReplicationInterceptor.java:150)
     at org.jboss.cache.interceptors.ReplicationInterceptor.visitClearDataCommand(ReplicationInterceptor.java:137)
     at org.jboss.cache.commands.write.ClearDataCommand.acceptVisitor(ClearDataCommand.java:86)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)
     at org.jboss.cache.commands.AbstractVisitor.visitClearDataCommand(AbstractVisitor.java:80)
     at org.jboss.cache.commands.write.ClearDataCommand.acceptVisitor(ClearDataCommand.java:86)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.TxInterceptor.replayModifications(TxInterceptor.java:501)
     at org.jboss.cache.interceptors.TxInterceptor.handleRemotePrepare(TxInterceptor.java:388)
     at org.jboss.cache.interceptors.TxInterceptor.visitPrepareCommand(TxInterceptor.java:134)
     at org.jboss.cache.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:68)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)
     at org.jboss.cache.commands.AbstractVisitor.visitPrepareCommand(AbstractVisitor.java:140)
     at org.jboss.cache.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:68)
     at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)
     at org.jboss.cache.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:178)
     at org.jboss.cache.interceptors.InvocationContextInterceptor.visitPrepareCommand(InvocationContextInterceptor.java:106)
     at org.jboss.cache.commands.tx.PrepareCommand.acceptVisitor(PrepareCommand.java:68)
     at org.jboss.cache.interceptors.InterceptorChain.invokeRemote(InterceptorChain.java:316)
     at org.jboss.cache.commands.remote.ReplicateCommand.processSingleCommand(ReplicateCommand.java:139)
     at org.jboss.cache.commands.remote.ReplicateCommand.perform(ReplicateCommand.java:115)
     at org.jboss.cache.marshall.CommandAwareRpcDispatcher.executeCommand(CommandAwareRpcDispatcher.java:319)
     at org.jboss.cache.marshall.CommandAwareRpcDispatcher.handle(CommandAwareRpcDispatcher.java:246)
     at org.jgroups.blocks.RequestCorrelator.handleRequest(RequestCorrelator.java:637)
     at org.jgroups.blocks.RequestCorrelator.receiveMessage(RequestCorrelator.java:545)
     at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:368)
     at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:775)
     at org.jgroups.JChannel.up(JChannel.java:1336)
     at org.jgroups.mux.Multiplexer$Task.run(Multiplexer.java:1185)
     at org.jgroups.mux.Multiplexer$ExecuteTask.run(Multiplexer.java:1208)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
     at java.lang.Thread.run(Thread.java:619)


We found out about this while doing more extensive QA on GateIn:
 https://jira.jboss.org/jira/browse/GTNPORTAL-855 https://jira.jboss.org/jira/browse/GTNPORTAL-855

The code returning the NPE is simply:
public void clearDataDirect()
{
   node.clear();
}

Looks like a bug, if you confirm I can create the Jira

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