com.rabbitmq.client.impl.StrictExceptionHandler.handleConsumerException(StrictExceptionHandler.java:61)

[zfy68]

Please, What caused the exception？

ERROR 2022-03-23 02:14:29:begin amq.ctag--sY7m4GwBAyNZ67uXOtWpQ ERROR 2022-03-23 02:14:29:end com.rabbitmq.client.ShutdownSignalException: clean channel shutdown; protocol method: #method<channel.close>(reply-code=200, reply-text=Closed due to exception from Consumer com.consumerThread$1@7fa23ffa (amq.ctag--sY7m4GwBAyNZ67uXOtWpQ) method handleDelivery for channel AMQChannel(amqp://[email protected]:5675/,1), class-id=0, method-id=0) at com.rabbitmq.client.impl.ChannelN.close(ChannelN.java:554) at com.rabbitmq.client.impl.ChannelN.close(ChannelN.java:509) at com.rabbitmq.client.impl.StrictExceptionHandler.handleChannelKiller(StrictExceptionHandler.java:72) at com.rabbitmq.client.impl.StrictExceptionHandler.handleConsumerException(StrictExceptionHandler.java:61) at com.rabbitmq.client.impl.ConsumerDispatcher$5.run(ConsumerDispatcher.java:149) at com.rabbitmq.client.impl.ConsumerWorkService$WorkPoolRunnable.run(ConsumerWorkService.java:99) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) INFO 2022-03-23 02:14:39:begin send DI success : 200 INFO 2022-03-23 02:14:39:end

[michaelklishin]

Consider never using GitHub issues for questions, in particular when the repository has Didscussions enabled.

StrictExceptionHandler, unlike ForgivingExceptionHandler, closes the channel when any method of your Consumer interface implementation throws an exception when the library calls it.

[zfy68]

Thanks for the reminder, I'll keep an eye out for it in the future.

[zfy68]

I use the consumer handleShutdownSignal method to catch the exception, then close the channell and connection, and try to re-establish the connection. But if it is StrictExceptionHandler doesn't seem to work.

            Consumer consumer = new DefaultConsumer(channel) {
                @Override
                public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                    System.out.println(new String(body));
                    channel.basicAck(envelope.getDeliveryTag(), false);
                }

                @Override
                public void handleShutdownSignal(String consumerTag, ShutdownSignalException sig) {
                    // channel.close();
                    // connection.close();
                    // try reconnection
                }
            };

[michaelklishin]

handleShutdownSignal does not handle any exceptions. It is a way to react to a library-initiated shutdown.

Your code must handle any exceptions it may throw. StrictExceptionHandler will close the channel if any are thrown. It is not the library's responsibility to handle exceptions in your consumer code anyway.

[zfy68]

Yes, it is react to a library-initiated shutdown. The RabbitMQ source code encapsulates the internal exception handling as ShutdownSignalException, and consumers obtain exception information through the handleShutdownSignal method.