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how to config org.jboss.cache.loader.LocalDelegatingCacheLoader
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reply from <a href="https://community.jboss.org/people/lkrzyzanek">Libor Krzyžanek</a> in <i>JBoss Cache</i> - <a href="https://community.jboss.org/message/828121#828121">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi, </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm failed to config this cache loader in the tutorial, any clue should be helpful</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>=====my config=========</p><p>   <loaders passivation="false" shared="false"></p><p>        <!--</p><p>           we can have multiple cache loaders, which get chained</p><p>           --> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>          <loader class="org.jboss.cache.loader.LocalDelegatingCacheLoader" async="false" fetchPersistentState="true"</p><p>                ignoreModifications="true" purgeOnStartup="true">  </p><p>                 <properties></p><p>                  </properties></p><p>        </loader>  </p><p>  </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    </loaders></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>====error log of launching 1st instance ==== </p><p>2013-07-16 14:49:04,193 WARN  [org.jboss.cache.transaction.GenericTransactionManagerLookup] (main) Falling back to JBoss Cache's internal DummyTransactionManager</p><p>2013-07-16 14:49:04,584 INFO  [org.jboss.cache.RPCManagerImpl] (main) Received new cluster view: [127.0.0.1:53717|1] [127.0.0.1:53717, 127.0.0.1:54627]</p><p>2013-07-16 14:49:04,615 INFO  [org.jboss.cache.statetransfer.DefaultStateTransferIntegrator] (Incoming-1,127.0.0.1:54627) Using version 4096</p><p>2013-07-16 14:49:04,615 INFO  [org.jboss.cache.interceptors.CacheLoaderInterceptor] (Incoming-1,127.0.0.1:54627) Cache loader was unable to load state</p><p>java.lang.NullPointerException</p><p>          at org.jboss.cache.loader.LocalDelegatingCacheLoader.getChildrenNames(LocalDelegatingCacheLoader.java:74)</p><p>          at org.jboss.cache.loader.AbstractDelegatingCacheLoader.getChildrenNames(AbstractDelegatingCacheLoader.java:84)</p><p>          at org.jboss.cache.interceptors.CacheLoaderInterceptor.loadChildren(CacheLoaderInterceptor.java:362)</p><p>          at org.jboss.cache.interceptors.CacheLoaderInterceptor.visitGetChildrenNamesCommand(CacheLoaderInterceptor.java:191)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)</p><p>          at org.jboss.cache.commands.AbstractVisitor.visitGetChildrenNamesCommand(AbstractVisitor.java:125)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)</p><p>          at org.jboss.cache.commands.AbstractVisitor.visitGetChildrenNamesCommand(AbstractVisitor.java:125)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)</p><p>          at org.jboss.cache.interceptors.TxInterceptor.attachGtxAndPassUpChain(TxInterceptor.java:301)</p><p>          at org.jboss.cache.interceptors.TxInterceptor.handleDefault(TxInterceptor.java:283)</p><p>          at org.jboss.cache.commands.AbstractVisitor.visitGetChildrenNamesCommand(AbstractVisitor.java:125)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:131)</p><p>          at org.jboss.cache.commands.AbstractVisitor.visitGetChildrenNamesCommand(AbstractVisitor.java:125)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116)</p><p>          at org.jboss.cache.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:178)</p><p>          at org.jboss.cache.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:130)</p><p>          at org.jboss.cache.commands.AbstractVisitor.visitGetChildrenNamesCommand(AbstractVisitor.java:125)</p><p>          at org.jboss.cache.commands.read.GetChildrenNamesCommand.acceptVisitor(GetChildrenNamesCommand.java:115)</p><p>          at org.jboss.cache.interceptors.InterceptorChain.invoke(InterceptorChain.java:287)</p><p>          at org.jboss.cache.invocation.CacheInvocationDelegate.getChildrenNamesInternal(CacheInvocationDelegate.java:654)</p><p>          at org.jboss.cache.invocation.CacheInvocationDelegate.getChildrenNames(CacheInvocationDelegate.java:639)</p><p>          at org.jboss.cache.invocation.NodeInvocationDelegate.getChildrenNames(NodeInvocationDelegate.java:297)</p><p>          at org.jboss.cache.statetransfer.DefaultStateTransferIntegrator.integrateTransientState(DefaultStateTransferIntegrator.java:353)</p><p>          at org.jboss.cache.statetransfer.DefaultStateTransferIntegrator.integrateTransientState(DefaultStateTransferIntegrator.java:234)</p><p>          at org.jboss.cache.statetransfer.DefaultStateTransferIntegrator.integrateState(DefaultStateTransferIntegrator.java:113)</p><p>          at org.jboss.cache.statetransfer.DefaultStateTransferManager.setState(DefaultStateTransferManager.java:201)</p><p>          at org.jboss.cache.statetransfer.DefaultStateTransferManager.setState(DefaultStateTransferManager.java:165)</p><p>          at org.jboss.cache.remoting.jgroups.ChannelMessageListener.setState(ChannelMessageListener.java:297)</p><p>          at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.handleUpEvent(MessageDispatcher.java:714)</p><p>          at org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:776)</p><p>          at org.jgroups.JChannel.up(JChannel.java:1288)</p><p>          at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:454)</p><p>          at org.jgroups.protocols.pbcast.FLUSH.up(FLUSH.java:486)</p><p>          at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.connectToStateProvider(STREAMING_STATE_TRANSFER.java:575)</p><p>          at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.handleStateRsp(STREAMING_STATE_TRANSFER.java:512)</p><p>          at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER.up(STREAMING_STATE_TRANSFER.java:275)</p><p>          at org.jgroups.protocols.FRAG2.up(FRAG2.java:188)</p><p>          at org.jgroups.protocols.pbcast.GMS.up(GMS.java:820)</p><p>          at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:233)</p><p>          at org.jgroups.protocols.UNICAST.handleDataReceived(UNICAST.java:628)</p><p>          at org.jgroups.protocols.UNICAST.up(UNICAST.java:309)</p><p>          at org.jgroups.protocols.pbcast.NAKACK.up(NAKACK.java:750)</p><p>          at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:167)</p><p>          at org.jgroups.protocols.FD.up(FD.java:284)</p><p>          at org.jgroups.protocols.FD_SOCK.up(FD_SOCK.java:307)</p><p>          at org.jgroups.protocols.MERGE2.up(MERGE2.java:144)</p><p>          at org.jgroups.protocols.Discovery.up(Discovery.java:264)</p><p>          at org.jgroups.protocols.PING.up(PING.java:273)</p><p>          at org.jgroups.protocols.TP.passMessageUp(TP.java:1273)</p><p>          at org.jgroups.protocols.TP.access$100(TP.java:49)</p><p>          at org.jgroups.protocols.TP$IncomingPacket.handleMyMessage(TP.java:1826)</p><p>          at org.jgroups.protocols.TP$IncomingPacket.run(TP.java:1805)</p><p>          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)</p><p>          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)</p><p>          at java.lang.Thread.run(Thread.java:662)</p></div>
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