在WebLogic上阻止线程等待登录SiftingAppender

Question

我认为生产性能方面存在一个问题，因为我认为线程阻塞。

当我从生产环境中获取线程转储时，我感到惊讶的是大约50％的线程处于状态：

-阻止尝试获取锁定：ch / qos / logback / classic / sift / SiftingAppender @ 0x1111fe3e8 [未锁定]

同时，如您所见，SiftingAppender已“解锁”。

我不知道为什么会这样。

如果我们深入研究logback源，我们将找到一个同步方法，这是我认为的“瘦”地方：

ch.qos.logback.core.AppenderBase.doAppend(E)

public synchronized void doAppend(E eventObject) {
    // WARNING: The guard check MUST be the first statement in the
    // doAppend() method.

    // prevent re-entry.
    if (guard) {
      return;
    }

    try {
      guard = true;

      if (!this.started) {
        if (statusRepeatCount++ < ALLOWED_REPEATS) {
          addStatus(new WarnStatus(
              "Attempted to append to non started appender [" + name + "].",
              this));
        }
        return;
      }

      if (getFilterChainDecision(eventObject) == FilterReply.DENY) {
        return;
      }

      // ok, we now invoke derived class' implementation of append
      this.append(eventObject);

    } catch (Exception e) {
      if (exceptionCount++ < ALLOWED_REPEATS) {
        addError("Appender [" + name + "] failed to append.", e);
      }
    } finally {
      guard = false;
    }
  }

这是2个不同线程的完整堆栈：

"[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'" id=25 idx=0x68 tid=29025 prio=5 alive, blocked, native_blocked, daemon
-- Blocked trying to get lock: ch/qos/logback/classic/sift/SiftingAppender@0x1111fe3e8[unlocked]
at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method)
at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1411)[optimized]
at jrockit/vm/Locks.lockFat(Locks.java:1512)[optimized]
at jrockit/vm/Locks.monitorEnterSecondStageHard(Locks.java:1054)[optimized]
at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1005)[optimized]
at ch/qos/logback/core/AppenderBase.doAppend(AppenderBase.java:65)[optimized]
at ch/qos/logback/core/spi/AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)[inlined]
at ch/qos/logback/classic/Logger.appendLoopOnAppenders(Logger.java:280)[inlined]
at ch/qos/logback/classic/Logger.callAppenders(Logger.java:267)[inlined]
at ch/qos/logback/classic/Logger.buildLoggingEventAndAppend(Logger.java:449)[inlined]
at ch/qos/logback/classic/Logger.filterAndLog_1(Logger.java:421)[inlined]
at ch/qos/logback/classic/Logger.info(Logger.java:611)[inlined]
at cz/bsc/g6/components/base/web/services/api/exception/ServiceImplLoggingAndExceptionWebTranslationAspect.logAfter(ServiceImplLoggingAndExceptionWebTranslationAspect.java:167)[inlined]
at sun/reflect/GeneratedMethodAccessor672.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)[optimized]
at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
at java/lang/reflect/Method.invoke(Method.java:597)[optimized]
at org/springframework/aop/aspectj/AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)[inlined]
at org/springframework/aop/aspectj/AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:603)[inlined]
at org/springframework/aop/aspectj/AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:45)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/framework/adapter/MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:50)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/interceptor/ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/framework/JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)[optimized]
at $Proxy538.getVoLinkValue(Ljava/lang/Class;Ljava/lang/String;)Lcz/bsc/g6/components/base/web/services/api/vo/catalog/VoLink;(Unknown Source)[optimized]
at cz/bsc/g6/components/hccommon/web/ui/component/PortalMenuComponent.getItemName(PortalMenuComponent.java:112)[inlined]
at cz/bsc/g6/components/hccommon/web/ui/component/PortalMenuComponent.getMenuItems(PortalMenuComponent.java:46)[optimized]
at sun/reflect/GeneratedMethodAccessor1005.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)[optimized]
at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
at java/lang/reflect/Method.invoke(Method.java:597)[optimized]
at javax/el/BeanELResolver.getValue(BeanELResolver.java:305)[optimized]
at com/sun/faces/el/DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)[inlined]
at com/sun/faces/el/DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)[optimized]
at com/sun/el/parser/AstValue.getValue(AstValue.java:138)[inlined]
at com/sun/el/parser/AstValue.getValue(AstValue.java:183)[optimized]
at com/sun/el/ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)[optimized]
at com/sun/faces/facelets/el/TagValueExpression.getValue(TagValueExpression.java:109)[optimized]
at com/sun/faces/facelets/tag/jstl/core/IndexedValueExpression.getValue(IndexedValueExpression.java:92)
...
-- end of trace

"pool-4050-thread-2" id=19383 idx=0x8a8 tid=17037 prio=5 alive, blocked, native_blocked
-- Blocked trying to get lock: ch/qos/logback/classic/sift/SiftingAppender@0x1111fe3e8[unlocked]
at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method)
at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1411)[optimized]
at jrockit/vm/Locks.lockFat(Locks.java:1512)[optimized]
at jrockit/vm/Locks.monitorEnterSecondStageHard(Locks.java:1054)[optimized]
at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1005)[optimized]
at ch/qos/logback/core/AppenderBase.doAppend(AppenderBase.java:65)[optimized]
at ch/qos/logback/core/spi/AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:48)[inlined]
at ch/qos/logback/classic/Logger.appendLoopOnAppenders(Logger.java:280)[inlined]
at ch/qos/logback/classic/Logger.callAppenders(Logger.java:267)[inlined]
at ch/qos/logback/classic/Logger.buildLoggingEventAndAppend(Logger.java:449)[inlined]
at ch/qos/logback/classic/Logger.filterAndLog_1(Logger.java:421)[inlined]
at ch/qos/logback/classic/Logger.info(Logger.java:611)[optimized]
at cz/bsc/g6/components/base/transform/container/AbstractTransformerProvidersContainer.resolveProviderFromToInstance(AbstractTransformerProvidersContainer.java:377)[optimized]
at cz/bsc/g6/components/base/transform/AbstractToTransformer.transformToClass(AbstractToTransformer.java:241)
at cz/bsc/g6/components/card/ws/resources/impl/WsCreditCardDao.getCreditCards(WsCreditCardDao.java:103)
at cz/bsc/g6/components/card/manager/impl/CreditCardManagerImpl.getCreditCards(CreditCardManagerImpl.java:22)
at sun/reflect/GeneratedMethodAccessor2279.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
at java/lang/reflect/Method.invoke(Method.java:597)[inlined]
at org/springframework/aop/support/AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)[optimized]
at org/springframework/aop/framework/JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:196)[optimized]
at $Proxy286.getCreditCards()Ljava/util/List;(Unknown Source)
at cz/bsc/g6/components/card/web/services/impl/CreditCardWebServiceImpl.getCreditCards(CreditCardWebServiceImpl.java:54)
at sun/reflect/GeneratedMethodAccessor2277.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
at java/lang/reflect/Method.invoke(Method.java:597)[optimized]
at org/springframework/aop/support/AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)[inlined]
at org/springframework/aop/framework/ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)[inlined]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)[optimized]
at org/springframework/aop/aspectj/MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:80)
at cz/bsc/g6/components/base/web/services/impl/ServiceCallWrapperAspect.wrapCall(ServiceCallWrapperAspect.java:36)
at sun/reflect/GeneratedMethodAccessor1514.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;(Unknown Source)
at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)[optimized]
at java/lang/reflect/Method.invoke(Method.java:597)[inlined]
at org/springframework/aop/aspectj/AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)[optimized]
at org/springframework/aop/aspectj/AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
at org/springframework/aop/aspectj/AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:65)
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)[optimized]
at org/springframework/transaction/interceptor/TransactionInterceptor.invoke(TransactionInterceptor.java:110)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/aspectj/AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:55)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/aspectj/AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:42)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/framework/adapter/MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:50)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/interceptor/ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)[optimized]
at org/springframework/aop/framework/ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)[optimized]
at org/springframework/aop/framework/JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)[optimized]
at $Proxy527.getCreditCards()Ljava/util/List;(Unknown Source)
at cz/bsc/g6/components/card/web/ui/component/CreditCardListComponent.updateCreditCardsList(CreditCardListComponent.java:65)
at cz/bsc/g6/components/hccommon/web/ui/component/ProductListContainerComponent$2.run(ProductListContainerComponent.java:107)
at cz/bsc/g6/components/hccommon/web/ui/system/MultiThreadingUtility$G6Thread.call(MultiThreadingUtility.java:60)
at cz/bsc/g6/components/hccommon/web/ui/system/MultiThreadingUtility$G6Thread.call(MultiThreadingUtility.java:42)
at java/util/concurrent/FutureTask$Sync.innerRun(FutureTask.java:303)
at java/util/concurrent/FutureTask.run(FutureTask.java:138)
at java/util/concurrent/ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java/util/concurrent/ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java/lang/Thread.run(Thread.java:662)
at jrockit/vm/RNI.c2java(JJJJJ)V(Native Method)
-- end of trace

我们使用weblogic v.10.3.5.0 slf4j.version-1.7.5 logback.version-1.0.13

有谁知道它为什么发生以及如何避免这个问题？

Logback.xml

<?xml version="1.0" encoding="UTF-8" ?>

<property scope="system" name="logRoot" value="/opt/BSCPraha/GEMINI/IBS/logs" />

<appender name="COMMON" class="ch.qos.logback.classic.sift.SiftingAppender">
    <discriminator class="ch.qos.logback.classic.sift.MDCBasedDiscriminator">
        <key>SOURCE_APP</key>
        <defaultValue>common</defaultValue>
    </discriminator>
    <sift>
        <appender name="FILE-${SOURCE_APP}"
            class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${logRoot}/hc-${SOURCE_APP}.log
            </file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${logRoot}/hc-${SOURCE_APP}-%d{yyyy.MM.dd_HH}-%i.log
                </fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy
                    class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>1000MB</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
            </rollingPolicy>
            <encoder>
                <pattern>%d{ISO8601} [%t] %-5p %c{1} [%X{sessionId}] [%X{requestIp}] - %m%n</pattern>
                <immediateFlush>false</immediateFlush>
            </encoder>
        </appender>
    </sift>
</appender>

<!-- webstart module logger -->
<logger name="cz.bsc.g6.components.starter.webstart" additivity="false">
    <level value="info" />
</logger>

<!-- logging the XML interaction (calling Webservices of ESB) -->
<logger name="cz.bsc.g6.components.base.ws.resources.impl">
    <level value="debug" />
</logger>

<logger name="org.springframework.ws.soap.saaj.SaajSoapMessageFactory">
    <level value="debug" />
</logger>

<logger name="cz.bsc.g6">
    <level value="debug" />
</logger>

<!-- Logging EI data -->
<logger
    name="cz.bsc.g6.components.base.ei.services.impl.EiwsEndpoint.request">
    <level value="debug" />
</logger>

<logger
    name="cz.bsc.g6.components.base.ei.services.impl.EiwsEndpoint.response">
    <level value="info" />
</logger>

<!-- log SQL query -->
<logger name="org.hibernate.SQL">
    <level value="info" />
</logger>

<!-- log SQL query parameters values -->
<logger name="org.hibernate.engine.QueryParameters">
    <level value="info" />
</logger>
<logger name="org.hibernate.engine.query.HQLQueryPlan">
    <level value="info" />
</logger>

<root>
    <level value="info" />
    <appender-ref ref="COMMON" />
</root>

Answer 1

日志是否保存在NFS挂载上？ 将所有调试设置为信息，然后让我知道:)