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Posted to dev@manifoldcf.apache.org by "Karl Wright (JIRA)" <ji...@apache.org> on 2010/09/24 20:42:34 UTC
[jira] Resolved: (CONNECTORS-100) DB lock timeout
[ https://issues.apache.org/jira/browse/CONNECTORS-100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karl Wright resolved CONNECTORS-100.
------------------------------------
Assignee: Karl Wright
Fix Version/s: LCF Release 0.5
Resolution: Fixed
Set the Derby lock timeout internally to infinite. r1001023.
> DB lock timeout
> ---------------
>
> Key: CONNECTORS-100
> URL: https://issues.apache.org/jira/browse/CONNECTORS-100
> Project: Apache Connectors Framework
> Issue Type: Bug
> Components: Framework core
> Environment: Running unmodified dist/example from trunk/ using the default configuration.
> Reporter: Andrzej Bialecki
> Assignee: Karl Wright
> Fix For: LCF Release 0.5
>
>
> When a job is started and running (via crawler-ui) occasionally it's not possible to display a list of running jobs. The problem persists even after restarting ACF. The following exception is thrown in the console:
> {code}
> org.apache.acf.core.interfaces.ACFException: Database exception: Exception doing query: A lock could not be obtained within the time requested
> at org.apache.acf.core.database.Database.executeViaThread(Database.java:421)
> at org.apache.acf.core.database.Database.executeUncachedQuery(Database.java:465)
> at org.apache.acf.core.database.Database$QueryCacheExecutor.create(Database.java:1072)
> at org.apache.acf.core.cachemanager.CacheManager.findObjectsAndExecute(CacheManager.java:144)
> at org.apache.acf.core.database.Database.executeQuery(Database.java:167)
> at org.apache.acf.core.database.DBInterfaceDerby.performQuery(DBInterfaceDerby.java:727)
> at org.apache.acf.crawler.jobs.JobManager.makeJobStatus(JobManager.java:5611)
> at org.apache.acf.crawler.jobs.JobManager.getAllStatus(JobManager.java:5549)
> at org.apache.jsp.showjobstatus_jsp._jspService(showjobstatus_jsp.java:316)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
> at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
> at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
> at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
> at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> Caused by: java.sql.SQLTransactionRollbackException: A lock could not be obtained within the time requested
> at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.TransactionResourceImpl.wrapInSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.TransactionResourceImpl.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedConnection.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.ConnectionChild.handleException(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.derby.impl.jdbc.EmbedStatement.execute(Unknown Source)
> at org.apache.acf.core.database.Database.execute(Database.java:526)
> at org.apache.acf.core.database.Database$ExecuteQueryThread.run(Database.java:381)
> Caused by: java.sql.SQLException: A lock could not be obtained within the time requested
> at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
> at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
> ... 11 more
> Caused by: ERROR 40XL1: A lock could not be obtained within the time requested
> at org.apache.derby.iapi.error.StandardException.newException(Unknown Source)
> at org.apache.derby.impl.services.locks.ConcurrentLockSet.lockObject(Unknown Source)
> at org.apache.derby.impl.services.locks.ConcurrentLockSet.zeroDurationLockObject(Unknown Source)
> at org.apache.derby.impl.services.locks.AbstractPool.zeroDurationlockObject(Unknown Source)
> at org.apache.derby.impl.services.locks.ConcurrentPool.zeroDurationlockObject(Unknown Source)
> at org.apache.derby.impl.store.raw.xact.RowLocking2nohold.lockRecordForRead(Unknown Source)
> at org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown Source)
> at org.apache.derby.impl.store.access.heap.HeapController.lockRow(Unknown Source)
> at org.apache.derby.impl.store.access.btree.index.B2IRowLocking3.lockRowOnPage(Unknown Source)
> at org.apache.derby.impl.store.access.btree.index.B2IRowLocking3._lockScanRow(Unknown Source)
> at org.apache.derby.impl.store.access.btree.index.B2IRowLockingRR.lockScanRow(Unknown Source)
> at org.apache.derby.impl.store.access.btree.BTreeForwardScan.fetchRows(Unknown Source)
> at org.apache.derby.impl.store.access.btree.BTreeScan.fetchNextGroup(Unknown Source)
> at org.apache.derby.impl.sql.execute.BulkTableScanResultSet.reloadArray(Unknown Source)
> at org.apache.derby.impl.sql.execute.BulkTableScanResultSet.getNextRowCore(Unknown Source)
> at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown Source)
> at org.apache.derby.impl.sql.execute.GroupedAggregateResultSet.getRowFromResultSet(Unknown Source)
> at org.apache.derby.impl.sql.execute.GroupedAggregateResultSet.getNextRowFromRS(Unknown Source)
> at org.apache.derby.impl.sql.execute.GroupedAggregateResultSet.loadSorter(Unknown Source)
> at org.apache.derby.impl.sql.execute.GroupedAggregateResultSet.openCore(Unknown Source)
> at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.openCore(Unknown Source)
> at org.apache.derby.impl.sql.execute.BasicNoPutResultSetImpl.open(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source)
> at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source)
> ... 5 more
> {code}
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