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https://issues.apache.org/jira/browse/JCR-2822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052564#comment-13052564
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Sergei Kakareko commented on JCR-2822:
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Hi Guys
Did anybody try to fix it?
We got same stack traces in our server thread dumps recently.
I wonder if we should consider migrating to a newer version?
Thanks,
Sergei
> Deadlock on cluster during making changes on content repository
> ---------------------------------------------------------------
>
> Key: JCR-2822
> URL: https://issues.apache.org/jira/browse/JCR-2822
> Project: Jackrabbit Content Repository
> Issue Type: Bug
> Components: clustering, jackrabbit-core
> Affects Versions: 1.6.4, 2.1.2
> Environment: - JEE Web application with parallel web sessions
> - Several clusters of JEE server
> - Oracle database
> Reporter: aliaksandr shpak
>
> Deadlock is possible on cluster during making changes on content repository.
> The steps for deadlock are following:
> Thread 1 - making some changes on content repository. Code:
> public static void move(final Node node, final Node destNode, final Session
> session,
> final Boolean versionable) throws ItemNotFoundException,
> RepositoryException {
> final String path = node.getPath();
> final String name = node.getName();
> final String destPath = destNode.getPath() +
> FileSystem.SEPARATOR_CHAR + name;
> session.move(path, destPath);
> session.save();
> Thread 2 - tries to commit transaction and executes
> org.apache.jackrabbit.core.TransactionContext.prepare()
> What's happened:
> Thread 1:
> - Call session.move
> - ..., calls CachingHierarchyManager.nodeRemoved, it locks cacheMonitor
> - thread 2 in this time does sync and executes
> SharedItemStateManager.externalUpdate, which occurs write lock
> - thread 1 continues working and tries to occur read lock on
> SharedItemStateManager.hasItemState, but write lock is already on thread 2,
> so thread 1 starts wait
> Thread 2:
> - Calls TransactionBoundXAResource.prepare
> - comes to ClusterNode.consume
> - Executes SharedItemStateManager.externalUpdate, where occurs the write
> lock
> - And finally comes to CachingHierarchyManager.nodeModified, but can't
> proceed because of cacheMonitor is already locked by Thread1
> Thrace from Thread1:
> null at java.lang.Object.wait(J)V(Native Method)
> - waiting on <0xfffffffe7e84c348> (a
> EDU.oswego.cs.dl.util.concurrent.Latch)
> at java.lang.Object.wait()V(Object.java:474)
> at EDU.oswego.cs.dl.util.concurrent.Latch.acquire()V(Unknown Source)
> - locked <0xfffffffe7e84c348> (a EDU.oswego.cs.dl.util.concurrent.Latch)
> at
> org.apache.jackrabbit.core.state.FineGrainedISMLocking.acquireReadLock(Lorg/apache/jackrabbit/core/ItemId;)Lorg/apache/jackrabbit/core/state/ISMLocking$ReadLock;(FineGrainedISMLocking.java:112)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.acquireReadLock(Lorg/apache/jackrabbit/core/ItemId;)Lorg/apache/jackrabbit/core/state/ISMLocking$ReadLock;(SharedItemStateManager.java:1432)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.hasItemState(Lorg/apache/jackrabbit/core/ItemId;)Z(SharedItemStateManager.java:286)
> at
> org.apache.jackrabbit.core.state.XAItemStateManager.hasItemState(Lorg/apache/jackrabbit/core/ItemId;)Z(XAItemStateManager.java:302)
> at
> org.apache.jackrabbit.core.state.SessionItemStateManager.hasItemState(Lorg/apache/jackrabbit/core/ItemId;)Z(SessionItemStateManager.java:218)
> at
> org.apache.jackrabbit.core.HierarchyManagerImpl.hasItemState(Lorg/apache/jackrabbit/core/ItemId;)Z(HierarchyManagerImpl.java:164)
> at
> org.apache.jackrabbit.core.CachingHierarchyManager.nodeRemoved(Lorg/apache/jackrabbit/core/state/NodeState;Lorg/apache/jackrabbit/spi/Path;Lorg/apache/jackrabbit/core/NodeId;)V(CachingHierarchyManager.java:725)
> at
> org.apache.jackrabbit.core.CachingHierarchyManager.nodeRemoved(Lorg/apache/jackrabbit/core/state/NodeState;Lorg/apache/jackrabbit/spi/Name;ILorg/apache/jackrabbit/core/NodeId;)V(CachingHierarchyManager.java:455)
> - locked <0xfffffffe63626110> (a java.lang.Object)
> at
> org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyNodeRemoved(Lorg/apache/jackrabbit/core/state/NodeState;Lorg/apache/jackrabbit/spi/Name;ILorg/apache/jackrabbit/core/NodeId;)V(StateChangeDispatcher.java:207)
> at
> org.apache.jackrabbit.core.state.SessionItemStateManager.nodeRemoved(Lorg/apache/jackrabbit/core/state/NodeState;Lorg/apache/jackrabbit/spi/Name;ILorg/apache/jackrabbit/core/NodeId;)V(SessionItemStateManager.java:983)
> at
> org.apache.jackrabbit.core.state.NodeState.notifyNodeRemoved(Lorg/apache/jackrabbit/core/state/ChildNodeEntry;)V(NodeState.java:924)
> at
> org.apache.jackrabbit.core.state.NodeState.removeChildNodeEntry(Lorg/apache/jackrabbit/spi/Name;I)Z(NodeState.java:403)
> at
> org.apache.jackrabbit.core.SessionImpl.move(Ljava/lang/String;Ljava/lang/String;)V(SessionImpl.java:1118)
> at
> org.apache.jackrabbit.jca.JCASessionHandle.move(Ljava/lang/String;Ljava/lang/String;)V(JCASessionHandle.java:170)
> at
> mypackage.ContentRepositoryUtil.move(Ljavax/jcr/Node;Ljavax/jcr/Node;Ljavax/jcr/Session;)V(ContentRepositoryUtil.java:163)
> Thread 2:
> null at
> org.apache.jackrabbit.core.CachingHierarchyManager.nodeModified(Lorg/apache/jackrabbit/core/state/NodeState;)V(CachingHierarchyManager.java:306)
> - waiting to lock <0xfffffffe63626110> (a java.lang.Object)
> at
> org.apache.jackrabbit.core.CachingHierarchyManager.stateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(CachingHierarchyManager.java:293)
> at
> org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyStateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(StateChangeDispatcher.java:111)
> at
> org.apache.jackrabbit.core.state.SessionItemStateManager.stateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(SessionItemStateManager.java:889)
> at
> org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyStateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(StateChangeDispatcher.java:111)
> at
> org.apache.jackrabbit.core.state.LocalItemStateManager.stateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(LocalItemStateManager.java:452)
> at
> org.apache.jackrabbit.core.state.XAItemStateManager.stateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(XAItemStateManager.java:602)
> at
> org.apache.jackrabbit.core.state.StateChangeDispatcher.notifyStateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(StateChangeDispatcher.java:111)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.stateModified(Lorg/apache/jackrabbit/core/state/ItemState;)V(SharedItemStateManager.java:400)
> at
> org.apache.jackrabbit.core.state.ItemState.notifyStateUpdated()V(ItemState.java:244)
> at
> org.apache.jackrabbit.core.state.ChangeLog.persisted()V(ChangeLog.java:297)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.doExternalUpdate(Lorg/apache/jackrabbit/core/state/ChangeLog;)V(SharedItemStateManager.java:1209)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.externalUpdate(Lorg/apache/jackrabbit/core/state/ChangeLog;Lorg/apache/jackrabbit/core/observation/EventStateCollection;)V(SharedItemStateManager.java:1132)
> at
> org.apache.jackrabbit.core.RepositoryImpl$WorkspaceInfo.externalUpdate(Lorg/apache/jackrabbit/core/state/ChangeLog;Ljava/util/List;JLjava/lang/String;)V(RepositoryImpl.java:2193)
> at
> org.apache.jackrabbit.core.cluster.ClusterNode.process(Lorg/apache/jackrabbit/core/cluster/ChangeLogRecord;)V(ClusterNode.java:869)
> at
> org.apache.jackrabbit.core.cluster.ChangeLogRecord.process(Lorg/apache/jackrabbit/core/cluster/ClusterRecordProcessor;)V(ChangeLogRecord.java:507)
> at
> org.apache.jackrabbit.core.cluster.ClusterNode.consume(Lorg/apache/jackrabbit/core/journal/Record;)V(ClusterNode.java:815)
> at
> org.apache.jackrabbit.core.journal.AbstractJournal.doSync(J)V(AbstractJournal.java:214)
> at
> org.apache.jackrabbit.core.journal.AbstractJournal.lockAndSync()V(AbstractJournal.java:258)
> at
> org.apache.jackrabbit.core.journal.DefaultRecordProducer.append()Lorg/apache/jackrabbit/core/journal/Record;(DefaultRecordProducer.java:51)
> at
> org.apache.jackrabbit.core.cluster.ClusterNode$WorkspaceUpdateChannel.updateCreated(Lorg/apache/jackrabbit/core/cluster/Update;)V(ClusterNode.java:602)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager$Update.begin()V(SharedItemStateManager.java:554)
> at
> org.apache.jackrabbit.core.state.SharedItemStateManager.beginUpdate(Lorg/apache/jackrabbit/core/state/ChangeLog;Lorg/apache/jackrabbit/core/observation/EventStateCollectionFactory;Lorg/apache/jackrabbit/core/virtual/VirtualItemStateProvider;)Lorg/apache/jackrabbit/core/state/SharedItemStateManager$Update;(SharedItemStateManager.java:1085)
> at
> org.apache.jackrabbit.core.state.XAItemStateManager.prepare(Lorg/apache/jackrabbit/core/TransactionContext;)V(XAItemStateManager.java:163)
> at
> org.apache.jackrabbit.core.TransactionContext.prepare()V(TransactionContext.java:153)
> - locked <0xfffffffe7e4b17a8> (a
> org.apache.jackrabbit.core.TransactionContext)
> at
> org.apache.jackrabbit.core.XASessionImpl.prepare(Ljavax/transaction/xa/Xid;)I(XASessionImpl.java:331)
> at
> org.apache.jackrabbit.jca.TransactionBoundXAResource.prepare(Ljavax/transaction/xa/Xid;)I(TransactionBoundXAResource.java:68)
> at mypackage.XAResourceWrapper.prepare()I(XAResourceWrapper.java:61)
> repository.xml:
> <?xml version="1.0"?>
> <Repository>
> <FileSystem class="mypackage.OracleFileSystem">
> <param name="driver" value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@loclhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="schema" value="oracle" />
> <param name="schemaObjectPrefix" value="PREF_" />
> </FileSystem>
> <Security appName="Jackrabbit">
> <AccessManager
>
> class="org.apache.jackrabbit.core.security.simple.SimpleAccessManager">
> </AccessManager>
> <LoginModule
> class="org.apache.jackrabbit.core.security.SimpleLoginModule">
> <param name="anonymousId" value="anonymous" />
> </LoginModule>
> </Security>
> <Workspaces rootPath="${rep.home}/workspaces"
> defaultWorkspace="default" />
> <Workspace name="${wsp.name}">
> <FileSystem class="mypackage.OracleFileSystem">
> <param name="driver"
> value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@loclhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="schema" value="oracle" />
> <param name="schemaObjectPrefix" value="PREF_" />
> </FileSystem>
> <PersistenceManager
> class="mypackage.OracleBundlePersistenceManager">
> <param name="driver"
> value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@loclhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="schema" value="oracle" />
> <param name="schemaObjectPrefix" value="P_${wsp.name}_"
> />
> </PersistenceManager>
> <ISMLocking
> class="org.apache.jackrabbit.core.state.FineGrainedISMLocking"/>
> </Workspace>
> <Versioning rootPath="${rep.home}/version">
> <FileSystem class="mypackage.OracleFileSystem">
> <param name="driver"
> value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@localhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="schema" value="oracle" />
> <param name="schemaObjectPrefix" value="P_V_" />
> </FileSystem>
> <PersistenceManager
> class="mypackage.OracleBundlePersistenceManager">
> <param name="driver"
> value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@localhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="schema" value="oracle" />
> <param name="schemaObjectPrefix" value="P_V_" />
> </PersistenceManager>
> <ISMLocking
> class="org.apache.jackrabbit.core.state.FineGrainedISMLocking"/>
> </Versioning>
> <DataStore class="org.apache.jackrabbit.core.data.db.DbDataStore">
> <param name="driver" value="oracle.jdbc.driver.OracleDriver" />
> <param name="url"
> value="jdbc:oracle:thin:@localhost" />
> <param name="user" value="" />
> <param name="password" value="" />
> <param name="databaseType" value="oracle" />
> <param name="maxConnections" value="50" />
> <param name="tablePrefix" value="SO_CM_"/>
> </DataStore>
>
> <Cluster id="node1" syncDelay="2000">
> <Journal
> class="org.apache.jackrabbit.core.journal.OracleDatabaseJournal">
> <param name="revision" value="${rep.home}/revision.log"
> />
> <param name="driver"
> value="oracle.jdbc.driver.OracleDriver" />
> <param name="url" value="jdbc:oracle:thin:@localhost" />
> <param name="user" value="" />
> <param name="password" value=""/>
> <param name="schemaObjectPrefix" value="PREF_" />
> </Journal>
> </Cluster>
> </Repository>
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