Question

尝试记录通道错误并使用重试策略，我记录两个异常堆栈跟踪而不是一个异常堆栈跟踪。

频道配置：

<bean id="retryInterceptor" class="org.springframework.amqp.rabbit.config.StatelessRetryOperationsInterceptorFactoryBean">
    <property name="messageRecoverer" ref="rejectAndDontRequeueRecoverer"/>
    <property name="retryOperations" ref="retryTemplate" />
</bean> 
<bean id="rejectAndDontRequeueRecoverer" class="org.springframework.amqp.rabbit.retry.RejectAndDontRequeueRecoverer"/>

<!-- Configuration du retry -->
<bean id="retryTemplate" class="org.springframework.retry.support.RetryTemplate">
    <property name="backOffPolicy">
        <bean class="org.springframework.retry.backoff.ExponentialBackOffPolicy">
            <!-- Intervalle de temps en millisecondes entre deux tentatives -->
            <property name="initialInterval" value="2000" />
        </bean>     
    </property>
    <property name="retryPolicy">
        <bean class="org.springframework.retry.policy.SimpleRetryPolicy">
            <!-- Nombre de retry max -->
            <property name="maxAttempts" value="3" />
        </bean>     
    </property>
</bean> 


<bean id="log" class="com.logger.Logger"/>

<!-- Logger -->
<int:channel id="one" ></int:channel>
<int:channel id="error1" ></int:channel>
<int:publish-subscribe-channel id="processChannel1"  />  
<int:logging-channel-adapter channel="processChannel1" logger-name="log1" level="ERROR" expression="payload.message"/>   
<int:service-activator input-channel="processChannel1"  ref="log" output-channel="error1" />

<!-- Source -->
<rabbit:connection-factory id="connectionFactory" username="guest" password="guest" addresses="XX.XX.XX.XX:5672" cache-mode="CONNECTION" virtual-host="/" />
<int-amqp:inbound-channel-adapter channel="one" id="inboundChannelAdapter1" queue-names="myqueue" connection-factory="connectionFactory" error-channel="processChannel1" channel-transacted="true" advice-chain="retryInterceptor" />

<!-- Destination -->
<rabbit:connection-factory id="connectionFactoryRmqDest" username="guest" password="guest111" addresses="YY.YY.YY.YY:5672" cache-mode="CONNECTION" connection-cache-size="50" virtual-host="/" />
<rabbit:template id="rabbitTemplateRmqDest" connection-factory="connectionFactoryRmqDest" />
<int-amqp:outbound-channel-adapter channel="one" id="outboundChannelAdapter1" routing-key="keyMyQueue" exchange-name="direct.exchange" amqp-template="rabbitTemplateRmqDest" default-delivery-mode="PERSISTENT"/>

Logger.java

package com.logger;
public class Logger {

    public Message<?> log(Message<?> message) {
        System.out.println("*************************************");
        throw new AmqpException("Error on channel");
    }
}

日志文件：

2018-03-12 16:34:43.008 [(inner bean)#160e9f2e-1] ERROR log1 - error occurred in message handler [org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint#0]; nested exception is org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
2018-03-12 16:34:43.021 [(inner bean)#160e9f2e-1] ERROR log1 - Message conversion failed
2018-03-12 16:34:45.181 [(inner bean)#160e9f2e-1] ERROR log1 - error occurred in message handler [org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint#0]; nested exception is org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
2018-03-12 16:34:45.182 [(inner bean)#160e9f2e-1] ERROR log1 - Message conversion failed
2018-03-12 16:34:49.345 [(inner bean)#160e9f2e-1] ERROR log1 - error occurred in message handler [org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint#0]; nested exception is org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
2018-03-12 16:34:49.346 [(inner bean)#160e9f2e-1] ERROR log1 - Message conversion failed

删除表达式属性，堆栈跟踪（只需尝试3次重试）：

2018-03-12 17:24:03.303 [(inner bean)#76e1e924-1] ERROR log1 - org.springframework.messaging.MessageHandlingException: error occurred in message handler [org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint#0]; nested exception is org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile., failedMessage=GenericMessage [payload=byte[20], headers={timestamp=1520871843104, id=7c9f713f-90a1-2720-60e4-a0e33ef98ecb, amqp_receivedRoutingKey=myqueue, amqp_consumerQueue=myqueue, amqp_consumerTag=amq.ctag-ENdQ-j6xD1LRXDxGr_iJuQ, amqp_receivedDeliveryMode=NON_PERSISTENT, amqp_redelivered=false, amqp_deliveryTag=1}]
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:139)
    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:89)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:425)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:375)
    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:188)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.access$1100(AmqpInboundChannelAdapter.java:56)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.processMessage(AmqpInboundChannelAdapter.java:246)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.onMessage(AmqpInboundChannelAdapter.java:203)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:848)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:771)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:102)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:198)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor$1.doWithRetry(RetryOperationsInterceptor.java:74)
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:276)
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:172)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor.invoke(RetryOperationsInterceptor.java:98)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy9.invokeListener(Unknown Source)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1311)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:752)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1254)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1224)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1600(SimpleMessageListenerContainer.java:102)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1470)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
    at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:65)
    at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:368)
    at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:603)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1430)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1411)
    at org.springframework.amqp.rabbit.core.RabbitTemplate.send(RabbitTemplate.java:712)
    at org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint.send(AmqpOutboundEndpoint.java:134)
    at org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint.handleRequestMessage(AmqpOutboundEndpoint.java:122)
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:109)
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127)
    ... 38 more
Caused by: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.
    at com.rabbitmq.client.impl.AMQConnection.start(AMQConnection.java:342)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:909)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:859)
    at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:799)
    at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:352)
    ... 46 more

2018-03-12 17:24:03.314 [(inner bean)#76e1e924-1] ERROR log1 - org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Message conversion failed
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.onMessage(AmqpInboundChannelAdapter.java:223)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:848)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:771)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:102)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:198)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor$1.doWithRetry(RetryOperationsInterceptor.java:74)
    at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:276)
    at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:172)
    at org.springframework.retry.interceptor.RetryOperationsInterceptor.invoke(RetryOperationsInterceptor.java:98)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy9.invokeListener(Unknown Source)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1311)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:752)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1254)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1224)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1600(SimpleMessageListenerContainer.java:102)
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1470)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.messaging.MessageHandlingException: nested exception is org.springframework.amqp.AmqpException: Erreur sur le channel, failedMessage=EnhancedErrorMessage [payload=org.springframework.messaging.MessageHandlingException: error occurred in message handler [org.springframework.integration.amqp.outbound.AmqpOutboundEndpoint#0]; nested exception is org.springframework.amqp.AmqpAuthenticationException: com.rabbitmq.client.AuthenticationFailureException: ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile., failedMessage=GenericMessage [payload=byte[20], headers={timestamp=1520871843104, id=7c9f713f-90a1-2720-60e4-a0e33ef98ecb, amqp_receivedRoutingKey=myqueue, amqp_consumerQueue=myqueue, amqp_consumerTag=amq.ctag-ENdQ-j6xD1LRXDxGr_iJuQ, amqp_receivedDeliveryMode=NON_PERSISTENT, amqp_redelivered=false, amqp_deliveryTag=1}], headers={timestamp=1520871843291, id=dbde6a9f-3c26-086f-53a1-7c98482efcce, amqp_raw_message=(Body:'[B@56360d58(byte[20])' MessageProperties [headers={}, timestamp=null, messageId=null, userId=null, receivedUserId=null, appId=null, clusterId=null, type=null, correlationId=null, correlationIdString=null, replyTo=null, contentType=null, contentEncoding=null, contentLength=0, deliveryMode=null, receivedDeliveryMode=NON_PERSISTENT, expiration=null, priority=null, redelivered=false, receivedExchange=, receivedRoutingKey=myqueue, receivedDelay=null, deliveryTag=1, messageCount=0, consumerTag=amq.ctag-ENdQ-j6xD1LRXDxGr_iJuQ, consumerQueue=myqueue])}] for original GenericMessage [payload=byte[20], headers={timestamp=1520871843104, id=7c9f713f-90a1-2720-60e4-a0e33ef98ecb, amqp_receivedRoutingKey=myqueue, amqp_consumerQueue=myqueue, amqp_consumerTag=amq.ctag-ENdQ-j6xD1LRXDxGr_iJuQ, amqp_receivedDeliveryMode=NON_PERSISTENT, amqp_redelivered=false, amqp_deliveryTag=1}]
    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.BroadcastingDispatcher.invokeHandler(BroadcastingDispatcher.java:236)
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.dispatch(BroadcastingDispatcher.java:185)
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:89)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:425)
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:375)
    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.sendErrorMessageIfNecessary(MessageProducerSupport.java:207)
    at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:191)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.access$1100(AmqpInboundChannelAdapter.java:56)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.processMessage(AmqpInboundChannelAdapter.java:246)
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$Listener.onMessage(AmqpInboundChannelAdapter.java:203)
    ... 25 more
Caused by: org.springframework.amqp.AmqpException: Erreur sur le channel
    at com.logger.Logger.log(Logger.java:36)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:117)
    at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129)
    at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
    at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:347)
    at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
    at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:132)
    at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:360)
    at org.springframework.integration.util.AbstractExpressionEvaluator.evaluateExpression(AbstractExpressionEvaluator.java:169)
    at org.springframework.integration.util.MessagingMethodInvokerHelper.processInternal(MessagingMethodInvokerHelper.java:319)
    at org.springframework.integration.util.MessagingMethodInvokerHelper.process(MessagingMethodInvokerHelper.java:155)
    at org.springframework.integration.handler.MethodInvokingMessageProcessor.processMessage(MethodInvokingMessageProcessor.java:93)
    ... 41 more

在日志文件中，我有3次尝试传输消息。 =＆GT;重试没问题

我想只有一个堆栈跟踪？ “消息转换失败”的意思是什么？我该如何预防？

有没有办法测试异常的原因是空还是空？我想在表达式中使用“payload.cause.message”？

感谢您的帮助，

问候

Eric

Answer 1

第一条日志消息来自<int:logging-channel-adapter>，因为您在error-channel="processChannel1"上使用了<int-amqp:outbound-channel-adapter>。

第二个来自AbstractMessageListenerContainer，因为您的Logger没有记录消息，但确实如此：

throw new AmqpException("Error on channel");

所以，当我们进入AmqpInboundChannelAdapter.Listener时：

getMessagingTemplate().send(getErrorChannel(), buildErrorMessage(null,
                        new ListenerExecutionFailedException("Message conversion failed", e, message)));

将错误消息发送到错误通道，您只需从顶级AMQP侦听器重新抛出异常，然后再将其记录一次。

您应该考虑不要从Logger组件重新抛出异常，或者不要再使用一个<int:logging-channel-adapter>订阅者，或者只是不要使用{{1完全接近！

对于error-channel表达式，您应该使用SpEL三元运算符：payload.cause.message

<强>更新

行。我知道发生了什么。

我们在payload.cause != null ? payload.cause.message : payload.message进程中向errorChannel发送了一个例外：

MessageProducerSupport.sendMessage()

由于你还有一个订阅者抛出一个新的异常（或者只是重新抛出），try { this.messagingTemplate.send(getOutputChannel(), message); } catch (RuntimeException e) { if (!sendErrorMessageIfNecessary(message, e)) { throw e; } }结束时会出现冒泡异常。这个问题来自前面提到过的sendErrorMessageIfNecessary()的{{1}}。并向catch (RuntimeException e) {发送新的AmqpInboundChannelAdapter.Listener.onMessage()。这就是你如何看到另一条记录消息的方式。但是，由于第二个订阅者重新抛出异常，它将如何返回到侦听器容器并启动重试。在所有重试尝试之后，您只能看到一次堆栈跟踪。但是我可以猜测它已经是一个错误的堆栈跟踪，因为您希望看到发送到AMQP问题的真正原因。

我建议您在此处作为解决方案是这样的：

ErrorMessage

errorChannel

没有error-channel的第二个订阅者 - 现有的<int-amqp:inbound-channel-adapter>就足够了。
您使用processChannel1 <int:logging-channel-adapter>和ExpressionEvaluatingRequestHandlerAdvice failureChannel

processChannel1

将此onFailureExpression用作#this

ExpressionEvaluatingRequestHandlerAdvice

通过这种方式，您可以在每次重试时获取日志，并根据<request-handler-advice-chain>，将一个真正的异常重新抛给侦听器cotnainer进行重试。

日志通道错误多个堆栈跟踪

1 个答案: