spring-amqp检测ConnectException

Question

我如何在启动应用程序时检测到此异常：

org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection timed out: connect

该项目以 Spring 方式配置 (http://projects.spring.io/spring-amqp/)，我可以在日志中看到错误，但我无法在我的 java 中检测到它类.

Consumer raised exception, processing can restart if the connection factory supports it. Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection timed out: connect
Restarting Consumer: tags=[{}], channel=null, acknowledgeMode=AUTO local queue size=0
Failed to check/redeclare auto-delete queue(s).org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection timed out: connect
at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:54)
at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:217)
at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:444)
at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.createConnection(ConnectionFactoryUtils.java:80)
at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.doGetTransactionalResourceHolder(ConnectionFactoryUtils.java:130)
at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.getTransactionalResourceHolder(ConnectionFactoryUtils.java:67)
at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1035)
at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1028)
at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1004)
at org.springframework.amqp.rabbit.core.RabbitAdmin.getQueueProperties(RabbitAdmin.java:254)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.redeclareElementsIfNecessary(SimpleMessageListenerContainer.java:947)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access0(SimpleMessageListenerContainer.java:82)
at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1065)
at java.lang.Thread.run(Thread.java:745)

Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at com.rabbitmq.client.impl.FrameHandlerFactory.create(FrameHandlerFactory.java:32)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:615)
at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:651)
at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:208)
... 12 more

例如，当您无法访问 AMQP 端口时，就会发生这种情况。

谢谢！

Answer 1

发生此错误时当前没有发出任何事件（我创建了一个 JIRA issue 来添加一个。

同时，由于连接是共享的，您可以不时从自己的代码中调用连接工厂的 createConnection()，以检查连接状态。

或者，您可以连接到日志子系统以捕获 WARN 日志，如我在 this answer 中所述。

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