Wie die Ursache zu finden, wenn Sperre auftritt

Question

Ich verwende EJB Container (Glassfish 4.0), um meine Webanwendung auszuführen, wird es einen Thread aus Thread-Pool verwenden, um jede Anforderung von Client zu behandeln.Nach dem Ausführen für eine bestimmte Zeit scheinen viele Fäden blocked.I bekam folgende Informationen mit jstack zu sein:

"default-http(6)" daemon prio=10 tid=0x00007f2c9c009000 nid=0x6cb9 waiting on condition [0x00007f2fd53fb000] 
    java.lang.Thread.State: WAITING (parking) 
    at sun.misc.Unsafe.park(Native Method) 
    - parking to wait for <0x00007f4740824750> (a java.util.concurrent.locks.ReentrantReadWriteLock$FairSync) 
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186) 
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834) 
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867) 
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197) 
    at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:945) 
    at com.sun.ejb.containers.CMCSingletonContainer._getContext(CMCSingletonContainer.java:141) 
    at com.sun.ejb.containers.BaseContainer.getContext(BaseContainer.java:2516) 
    at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1906) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:210) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) 
    at com.sun.proxy.$Proxy475.openAccount(Unknown Source) 
    at com.creditcloud.boc.local.__EJB31_Generated__BocClient__Intf____Bean__.openAccount(Unknown Source) 
    at com.creditcloud.boc.BocServiceBean.openAccount(BocServiceBean.java:242) 
    at sun.reflect.GeneratedMethodAccessor1053.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) 
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) 
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:55) 
    at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140) 
    at sun.reflect.GeneratedMethodAccessor93.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) 
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) 
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) 
    at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:205) 
    at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79) 
    at com.sun.proxy.$Proxy470.openAccount(Unknown Source) 
    at sun.reflect.GeneratedMethodAccessor1052.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:143) 
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:173) 
    at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528) 
    at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199) 
    at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549) 
    at com.sun.corba.ee.impl.protocol.SharedCDRClientRequestDispatcherImpl.marshalingComplete(SharedCDRClientRequestDispatcherImpl.java:119) 
    at com.sun.corba.ee.impl.protocol.ClientDelegateImpl.invoke(ClientDelegateImpl.java:272) 
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:198) 
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:150) 
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:226) 
    at com.creditcloud.boc.api.__BocService_Remote_DynamicStub.openAccount(com/creditcloud/boc/api/__BocService_Remote_DynamicStub.java) 
    at com.creditcloud.boc.api._BocService_Wrapper.openAccount(com/creditcloud/boc/api/_BocService_Wrapper.java) 
    at com.creditcloud.creditmarket.local.BocBridge.openAccount(BocBridge.java:140) 
    at com.creditcloud.creditmarket.local.BocBridge.openAccount(BocBridge.java:185) 
    at sun.reflect.GeneratedMethodAccessor789.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081) 
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153) 
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695) 
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46) 
    at sun.reflect.GeneratedMethodAccessor92.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163) 
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140) 
    at sun.reflect.GeneratedMethodAccessor93.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883) 
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822) 
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369) 
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667) 
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212) 
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88) 
    at com.sun.proxy.$Proxy641.openAccount(Unknown Source) 
    at com.creditcloud.creditmarket.local.__EJB31_Generated__BocBridge__Intf____Bean__.openAccount(Unknown Source) 
    at com.creditcloud.creditmarket.resources.api.v2.BocApiResource.openAccount(BocApiResource.java:75) 
    at sun.reflect.GeneratedMethodAccessor788.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81) 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125) 
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:195) 
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341) 
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101) 
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224) 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271) 
    at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:315) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:297) 
    at org.glassfish.jersey.internal.Errors.process(Errors.java:267) 
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317) 
    at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:198) 
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946) 
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323) 
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372) 
    at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:525) 
    at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:473) 
    at org.glassfish.jersey.servlet.ServletContainer.doFilter(ServletContainer.java:410) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:316) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) 
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188) 
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191) 
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168) 
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189) 
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136) 
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114) 
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) 
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838) 
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55) 
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564) 
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544) 
    at java.lang.Thread.run(Thread.java:744) 

ich habe meine LocalBean geprüft, nicht das finden synchronized oder Lock in it.Is es einen Ansatz, um herauszufinden, die Ursache?

Answer 1

Ich kenne die inneren Details der Glassfish EJB-Container-Implementierung nicht, aber einige Schlussfolgerungen scheinen offensichtlich. Sie haben eine Singleton Bean (com.sun.ejb.containers.CMCSingletonContainer). Dies bedeutet, dass nur eine Instanz der Bean für die Lebensdauer der Anwendung erstellt wird.

Sie haben wahrscheinlich Bean Managed Concurrency oder andere Nebenläufigkeit bezogene Annotationen auf den Bean-Methoden nicht konfiguriert. Dies bedeutet, dass der Conatiner die standardmäßige Parallelitätsstrategie verwendet: Containerverwaltete Parallelität, wobei jede Methode eine implizite Schreibsperre hat, die jeden Methodenaufruf effectivley serialisiert.

Sie könnten besser sein, Bean Managed Concurrency, oder ordnungsgemäße Concurrency Annotationen auf Ihre Bean-Methoden, aber das hängt natürlich von der inhärenten Parallelität Unterstützung Ihrer Logik.

All dies ist in der EJB-Spezifikation ziemlich genau definiert.