Java 堆栈跟踪被截断的 NullPointerException

Question

我的 RabbitMQ 监听器出现以下故障。我使用 Spring Boot 1.4.1 和 Spring 集成 4.3.3（使用 spring-boot-starter-amqp 和 spring-integration-amqp）。我也用 RabbitMQ 3.5.7.

少量消息出现问题，在大量流量下随机发生（到目前为止，运气不好，无法在本地重现）。

令我困惑的是，堆栈跟踪并不指向我的应用程序，而是指向框架。下面我附上了完整的堆栈跟踪。是 spring、rabbitMQ 驱动程序或服务器中的错误吗？

2017-05-02 10:38:42.337 [501de2ff-cd24-4c28-8434-48bc942457d9]  WARN 1 --- [messageListenerContainer-2] s.a.r.l.ConditionalRejectingErrorHandler : Execution of Rabbit message listener failed.

org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener threw exception
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:870)
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:780)
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:700)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access[=11=]1(SimpleMessageListenerContainer.java:95)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:187)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1187)
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:681)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1165)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1149)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access00(SimpleMessageListenerContainer.java:95)
        at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1312)
        at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.messaging.MessageHandlingException: nested exception is java.lang.NullPointerException
        at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:96)
        at org.springframework.integration.handler.ServiceActivatingHandler.handleRequestMessage(ServiceActivatingHandler.java:89)
        at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:109)
        at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
        at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
        at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
        at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
        at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)
        at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
        at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
        at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
        at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
        at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
        at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:292)
        at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:212)
        at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:129)
        at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:115)
        at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
        at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116)
        at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:148)
        at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:121)
        at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77)
        at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:423)
        at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:373)
        at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115)
        at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45)
        at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105)
        at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:171)
        at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.access0(AmqpInboundChannelAdapter.java:45)
        at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.onMessage(AmqpInboundChannelAdapter.java:95)
        at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:777)
        ... 10 common frames omitted
Caused by: java.lang.NullPointerException: null

Answer 1

经过长时间的调查，结果证明 Spring 或 rabbitMQ 没有任何问题。根本原因在我自己的代码中。

问题所附的日志具有完整的堆栈跟踪，但 java 截断了堆栈跟踪！

Java 1.5.0 引入了标志 OmitStackTraceInFastThrow，默认启用。这就是性能优化。它从异常中删除堆栈跟踪的公共部分。

在我的例子中，我有这个异常的前 130 次出现的完整堆栈跟踪。进一步出现的堆栈跟踪被截断。获得完整堆栈跟踪的最简单方法是重新启动应用程序。

详情见http://jawspeak.com/2010/05/26/hotspot-caused-exceptions-to-lose-their-stack-traces-in-production-and-the-fix/。

Java 堆栈跟踪被截断的 NullPointerException

Java NullPointerException with truncated stacktrace

java

nullpointerexception

stack-trace