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https://issues.apache.org/jira/browse/OLIO-144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Zubb updated OLIO-144:
----------------------------
Environment:
CentOS 5.3 4GB RAM 4vCPU
ESX 4
Glassfish 2.2.1, JDK 1.6U18
Eclipselink 1.1.3
400 user load
was:
CentOS 5.3 4GB RAM 4vCPU
ESX 4
Glassfish 2.2.1, JDK 1.6U18
Eclipselink 1.1.3
> Encounter Eclipselink ConcurrencyException under heavy load
> -----------------------------------------------------------
>
> Key: OLIO-144
> URL: https://issues.apache.org/jira/browse/OLIO-144
> Project: Olio
> Issue Type: Bug
> Components: java-app
> Affects Versions: 0.2
> Environment: CentOS 5.3 4GB RAM 4vCPU
> ESX 4
> Glassfish 2.2.1, JDK 1.6U18
> Eclipselink 1.1.3
> 400 user load
> Reporter: James Zubb
> Assignee: Shanti Subramanyam
>
> I have been seeing eclipselink concurrencyexception when the system is under
> heavy load. Once the exception occurs the entire app hangs. Here is the
> exception:
> [#|2010-02-10T16:15:10.003-0800|WARNING|sun-appserver2.1|org.eclipse.persistence.session.file:/opt/glassfish/domains/domain1/applications/j2ee-modules/webapp/WEB-INF/classes/-BPWebappPu|_ThreadID=16;_ThreadName=httpSSLWorkerThread-8080-0;_RequestID=57c0781d-255f-4f9e-9ccf-41a5c296befe;|
> Local Exception Stack:
> Exception [EclipseLink-2004] (Eclipse Persistence Services -
> 1.1.3.v20091002-r5404):
> org.eclipse.persistence.exceptions.ConcurrencyException
> Exception Description: A signal was attempted before wait() on
> ConcurrencyManager. This normally means that an attempt was made to commit or
> rollback a transaction before it was started, or to rollback a transaction
> twice.
> at
> org.eclipse.persistence.exceptions.ConcurrencyException.signalAttemptedBeforeWait(ConcurrencyException.java:84)
> at
> org.eclipse.persistence.internal.helper.ConcurrencyManager.releaseReadLock(ConcurrencyManager.java:478)
> at
> org.eclipse.persistence.internal.identitymaps.CacheKey.releaseReadLock(CacheKey.java:433)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.cloneAndRegisterObject(UnitOfWorkImpl.java:939)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.cloneAndRegisterObject(UnitOfWorkImpl.java:833)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkIdentityMapAccessor.getAndCloneCacheKeyFromParent(UnitOfWorkIdentityMapAccessor.java:171)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkIdentityMapAccessor.getFromIdentityMap(UnitOfWorkIdentityMapAccessor.java:110)
> at
> org.eclipse.persistence.internal.sessions.IdentityMapAccessor.getFromIdentityMap(IdentityMapAccessor.java:327)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3776)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerExistingObject(UnitOfWorkImpl.java:3736)
> at
> org.eclipse.persistence.queries.ObjectBuildingQuery.registerIndividualResult(ObjectBuildingQuery.java:362)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneNormally(ObjectBuilder.java:582)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:544)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:485)
> at
> org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:437)
> at
> org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:569)
> at
> org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:904)
> at
> org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:490)
> at
> org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:928)
> at
> org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:664)
> at
> org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:889)
> at
> org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:458)
> at
> org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:952)
> at
> org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2750)
> at
> org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1181)
> at
> org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1165)
> at
> org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:81)
> at
> org.eclipse.persistence.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:71)
> at
> org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
> at
> org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiateImpl(UnitOfWorkValueHolder.java:161)
> at
> org.eclipse.persistence.internal.indirection.UnitOfWorkValueHolder.instantiate(UnitOfWorkValueHolder.java:230)
> at
> org.eclipse.persistence.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:83)
> at
> org.eclipse.persistence.indirection.IndirectList.buildDelegate(IndirectList.java:220)
> at
> org.eclipse.persistence.indirection.IndirectList.getDelegate(IndirectList.java:386)
> at
> org.eclipse.persistence.indirection.IndirectList$1.<init>(IndirectList.java:514)
> at
> org.eclipse.persistence.indirection.IndirectList.listIterator(IndirectList.java:513)
> at
> org.eclipse.persistence.indirection.IndirectList.iterator(IndirectList.java:477)
> at
> org.apache.olio.webapp.model.ModelFacade.getSocialEvent(ModelFacade.java:583)
> at
> org.apache.olio.webapp.controller.EventAction.process(EventAction.java:71)
> at
> org.apache.olio.webapp.controller.ControllerServlet.process(ControllerServlet.java:61)
> at
> org.apache.olio.webapp.controller.ControllerServlet.doGet(ControllerServlet.java:93)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
> at
> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
> at
> com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1093)
> at
> org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:291)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:666)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:597)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:872)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
> at
> com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:264)
> at
> com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
> |#]
> The culprit is the comments. I modified the allocation size of the
> CommentsRating table to 50000 (it is currently set at 20000) and it appears
> to fix this.
> I have also encountered this problem using Eclipselink 2.0 on Glassfish
> 2.2.1, I haven't tried Glassfish 3.
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