[jboss-jira] [JBoss JIRA] Created: (JBTM-207) Contention in TransactionReaper

[Phillip Thurmond (JIRA)]

Contention in TransactionReaper
-------------------------------

                 Key: JBTM-207
                 URL: http://jira.jboss.com/jira/browse/JBTM-207
             Project: JBoss Transaction Manager
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 4.2
         Environment: Linux, JDK 5
            Reporter: Phillip Thurmond
         Assigned To: Mark Little


Under heavy load I am seeing a lot of contention on the TransactionReaper object.  The remove() method has a large synchronized block.  Could this synchronization be decreased or made to be more fine-grained?

Stack trace:

"http-10.68.0.196-8080-247" daemon prio=1 tid=0x0000002af2b7b030 nid=0x351a waiting for monitor entry [0x000000005a95a000..0x000000005a95cb30]
        at com.arjuna.ats.arjuna.coordinator.TransactionReaper.remove(TransactionReaper.java:318)
        - waiting to lock <0x0000002aa7dc7248> (a com.arjuna.ats.arjuna.coordinator.TransactionReaper)
        at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:185)
        at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1204)
        at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:135)
        at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:87)
        at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:175)
        at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87)
        at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.remoting.ReplicantsManagerInterceptor.invoke(ReplicantsManagerInterceptor.java:51)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
        at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:105)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:204)
        at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:100)
        at $Proxy109.update(Unknown Source)
        at TodoDaoInt$$FastClassByCGLIB$$6f227f03.invoke(<generated>)
        at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
        at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:45)
        at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:74)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:55)
        at org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:40)
        at sun.reflect.GeneratedMethodAccessor362.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.jboss.seam.util.Reflections.invoke(Reflections.java:18)
        at org.jboss.seam.intercept.Interceptor.aroundInvoke(Interceptor.java:169)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:64)
        at org.jboss.seam.intercept.RootInterceptor.createSeamInvocationContext(RootInterceptor.java:144)
        at org.jboss.seam.intercept.RootInterceptor.invokeInContexts(RootInterceptor.java:129)
        at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:102)
        at org.jboss.seam.intercept.ClientSideInterceptor.interceptInvocation(ClientSideInterceptor.java:83)
        at org.jboss.seam.intercept.ClientSideInterceptor.intercept(ClientSideInterceptor.java:52)
        at org.jboss.seam.intercept.Proxy$$EnhancerByCGLIB$$e1e24e7.update(<generated>)
        at sun.reflect.GeneratedMethodAccessor422.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.el.parser.AstValue.invoke(AstValue.java:131)
        at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
        at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
        at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
        at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:95)
        at javax.faces.component.UICommand.broadcast(UICommand.java:383)
        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:448)

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