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Re: [eclipselink-users] bug: connection leak in Eclipselink
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I'm not sure there is a bug, atleast not yet. EclipseLink is using a
datasource and obtaining a connection and should release it in a finally
block within the beforeCompletion method. So all connections obtained
from EclipseLink should always be released. What settings are you using
on your datasource to monitor leaks? Could it just be that the settings
are not giving threads enough time to operate before assuming the thread
has leaked? Check to see if you have configured the
connection-leak-timeout-in-seconds
setting on your pool,and that if you are using it, it is set
sufficiently high for your application under load. If it is not, any
long operation will cause it to give this warning.
Best Regards,
Chris
On 06/10/2010 8:53 AM, Yannick Majoros wrote:
Hello,
I think there is a bug in Eclipselink. Regularly, we have connection
leaks (as detected by Glassfish) in our production app. It's an ejb 3
application, we don't create connections manually but rely on
EntityManager as provided by Eclipselink.
Is this a known bug and is there a solution?
Here is the stacktrace (from glassfish leak detection):
[#|2010-10-04T10:47:21.600+0200|WARNING|sun-appserver2.1|javax.enterprise.resource.resourceadapter|_ThreadID=107;_ThreadName=Timer-15;ConnectionPoolName=newEpcProdPool;_RequestID=72baa66d-db93-47ff-8906-b1b644fc1466;|A
potential connection leak detected for connection pool newEpcProdPool.
The stack trace of the thread is provided below :
com.sun.enterprise.resource.AbstractResourcePool.setResourceStateToBusy(AbstractResourcePool.java:304)
com.sun.enterprise.resource.AbstractResourcePool.getUnenlistedResource(AbstractResourcePool.java:691)
com.sun.enterprise.resource.AbstractResourcePool.internalGetResource(AbstractResourcePool.java:609)
com.sun.enterprise.resource.AbstractResourcePool.getResource(AbstractResourcePool.java:458)
com.sun.enterprise.resource.PoolManagerImpl.getResourceFromPool(PoolManagerImpl.java:248)
com.sun.enterprise.resource.PoolManagerImpl.getResource(PoolManagerImpl.java:176)
com.sun.enterprise.connectors.ConnectionManagerImpl.internalGetConnection(ConnectionManagerImpl.java:327)
com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:189)
com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:165)
com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:158)
com.sun.gjc.spi.base.DataSource.getConnection(DataSource.java:108)
org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:126)
org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:94)
org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
org.eclipse.persistence.internal.databaseaccess.DatasourceAccessor.connectInternal(DatasourceAccessor.java:327)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.connectInternal(DatabaseAccessor.java:291)
org.eclipse.persistence.internal.databaseaccess.DatasourceAccessor.reconnect(DatasourceAccessor.java:558)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.reconnect(DatabaseAccessor.java:1433)
org.eclipse.persistence.internal.databaseaccess.DatasourceAccessor.incrementCallCount(DatasourceAccessor.java:302)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:570)
org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:526)
org.eclipse.persistence.internal.sessions.AbstractSession.executeCall(AbstractSession.java:980)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:206)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:192)
org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.updateObject(DatasourceCallQueryMechanism.java:747)
org.eclipse.persistence.internal.queries.StatementQueryMechanism.updateObject(StatementQueryMechanism.java:430)
org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.updateObjectForWriteWithChangeSet(DatabaseQueryMechanism.java:1144)
org.eclipse.persistence.queries.UpdateObjectQuery.executeCommitWithChangeSet(UpdateObjectQuery.java:84)
org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:290)
org.eclipse.persistence.queries.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:58)
org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:736)
org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:643)
org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:108)
org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:85)
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2909)
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1291)
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1273)
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1233)
org.eclipse.persistence.internal.sessions.CommitManager.commitChangedObjectsForClassWithChangeSet(CommitManager.java:265)
org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:128)
org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:3348)
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1422)
org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.commitToDatabase(RepeatableWriteUnitOfWork.java:546)
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1527)
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3182)
org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:268)
org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:157)
org.eclipse.persistence.transaction.JTASynchronizationListener.beforeCompletion(JTASynchronizationListener.java:68)
com.sun.enterprise.distributedtx.J2EETransaction.commit(J2EETransaction.java:429)
com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.commit(J2EETransactionManagerOpt.java:371)
com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:3826)
com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:3605)
com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1388)
com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1325)
com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:205)
com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:83)
$Proxy112.saveValidationInscription(Unknown Source)
be.ucl.parcours.tttactionparcours.AllForSaveInscCours.saveInscriptionEtat(AllForSaveInscCours.java:50)
be.ucl.parcours.inscriptionCours.EnregistrerInscriptionCoursAction.execute(EnregistrerInscriptionCoursAction.java:130)
org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
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