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NullMarkerNodeForRemoval issue
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created by <a href="http://community.jboss.org/people/thomas.heute%40jboss.com">Thomas Heute</a> in <i>JBoss Cache</i> - <a href="http://community.jboss.org/message/538849#538849">View the full discussion</a>
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<div class="jive-rendered-content"><p>The NullMarkerNodeForRemoval object introduced to solve the following issue:</p><p><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/JBCACHE-1493" target="_blank">https://jira.jboss.org/jira/browse/JBCACHE-1493</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>is generating a NPE:</p><pre class="jive-pre"><code class="jive-code">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)
</code></pre><p>We found out about this while doing more extensive QA on GateIn:</p><p><a class="jive-link-external-small" href="https://jira.jboss.org/jira/browse/GTNPORTAL-855" target="_blank">https://jira.jboss.org/jira/browse/GTNPORTAL-855</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The code returning the NPE is simply:</p><pre class="jive-pre"><code class="jive-code">public void clearDataDirect()
{
   node.clear();
}</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Looks like a bug, if you confirm I can create the Jira</p></div>
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