Cluster journal appending fails during concurrent writes to multiple repository nodes in the cluster

This is probably an upstream (jackrabbit) issue.

Jun 24 12:50:40 s1720 2010-06-24 12:50:40,410 ERROR [TP-Processor13] org.apache.jackrabbit.core.cluster.ClusterNode - Unable to commit log entry.
Jun 24 12:50:40 s1720 org.apache.jackrabbit.core.journal.JournalException: Unable to append revision 4364629.
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.journal.DatabaseJournal.append(DatabaseJournal.java:558)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.journal.AppendRecord.update(AppendRecord.java:251)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.cluster.ClusterNode$WorkspaceUpdateChannel.updateCommitted(ClusterNode.java:650)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.SharedItemStateManager$Update.end(SharedItemStateManager.java:758)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.SharedItemStateManager.update(SharedItemStateManager.java:1104)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.jackrabbit.HippoSharedItemStateManager.update(HippoSharedItemStateManager.java:59)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.LocalItemStateManager.update(LocalItemStateManager.java:351)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.ForkedXAItemStateManager.update(ForkedXAItemStateManager.java:360)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.jackrabbit.HippoLocalItemStateManager.update(HippoLocalItemStateManager.java:227)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.LocalItemStateManager.update(LocalItemStateManager.java:326)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.jackrabbit.HippoLocalItemStateManager.update(HippoLocalItemStateManager.java:235)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.state.SessionItemStateManager.update(SessionItemStateManager.java:313)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.ItemImpl.save(ItemImpl.java:1103)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.SessionImpl.save(SessionImpl.java:858)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.decorating.SessionDecorator.save(SessionDecorator.java:202)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.impl.SessionDecorator.save(SessionDecorator.java:179)
Jun 24 12:50:40 s1720 at org.hippoecm.repository.impl.WorkflowManagerImpl$WorkflowInvocationHandler.invoke(WorkflowManagerImpl.java:499)
Jun 24 12:50:40 s1720 at $Proxy3.obtainEditableInstance(Unknown Source)
Jun 24 12:50:40 s1720 at org.hippoecm.frontend.plugins.reviewedactions.FullReviewedActionsWorkflowPlugin$3.execute(FullReviewedActionsWorkflowPlugin.java:137)
Jun 24 12:50:40 s1720 at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction.execute(CompatibilityWorkflowPlugin.java:156)
Jun 24 12:50:40 s1720 at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction.execute(CompatibilityWorkflowPlugin.java:142)
Jun 24 12:50:40 s1720 at org.hippoecm.addon.workflow.CompatibilityWorkflowPlugin$WorkflowAction.invoke(CompatibilityWorkflowPlugin.java:132)
Jun 24 12:50:40 s1720 at org.hippoecm.addon.workflow.MenuAction$1.onClick(MenuAction.java:43)
Jun 24 12:50:40 s1720 at org.hippoecm.addon.workflow.MenuLink.onClick(MenuLink.java:50)
Jun 24 12:50:40 s1720 at org.apache.wicket.ajax.markup.html.AjaxLink$1.onEvent(AjaxLink.java:68)
Jun 24 12:50:40 s1720 at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:177)
Jun 24 12:50:40 s1720 at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:299)
Jun 24 12:50:40 s1720 at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:119)
Jun 24 12:50:40 s1720 at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
Jun 24 12:50:40 s1720 at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:34)
Jun 24 12:50:40 s1720 at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1250)
Jun 24 12:50:40 s1720 at org.apache.wicket.RequestCycle.step(RequestCycle.java:1329)
Jun 24 12:50:40 s1720 at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
Jun 24 12:50:40 s1720 at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
Jun 24 12:50:40 s1720 at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:468)
Jun 24 12:50:40 s1720 at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138)
Jun 24 12:50:40 s1720 at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
Jun 24 12:50:40 s1720 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

Jun 24 12:50:40 s1720 Caused by: com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Duplicate entry '4364629' for key 1
Jun 24 12:50:40 s1720 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.Connection.execSQL(Connection.java:3283)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1332)
Jun 24 12:50:40 s1720 at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:882)
Jun 24 12:50:40 s1720 at org.apache.tomcat.dbcp.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:169)
Jun 24 12:50:40 s1720 at org.apache.jackrabbit.core.journal.DatabaseJournal.append(DatabaseJournal.java:552)
Jun 24 12:50:40 s1720 ... 55 more
Jun 24 12:51:36 s1720 2010-06-24 12:51:36,692 INFO [TP-Processor2] org.hippoecm.frontend.model.JcrSessionModel - [10.2.13.6] Login by:
Jun 24 12:53:23 s1720 2010-06-24 12:53:23,897 INFO [TP-Processor17] org.hippoecm.frontend.model.JcrSessionModel - [10.2.13.6] Login by: