spring cloud AWS SQS Listener Issue

Question

I am preparing demo programme which listen from the Amazon SQS.Below is my code.

xml config

<aws-messaging:annotation-driven-queue-listener  amazon-sqs="sqsClient" max-number-of-messages="10" wait-time-out="20" visibility-timeout="100" />

UserServiceListenr.java

@Configuration
@EnableSqs
@Component
public class UserServiceListenr {
    @SqsListener(value = "CMR", deletionPolicy = SqsMessageDeletionPolicy.ON_SUCCESS)
    public void myQueueListener(Message message) throws Exception{
        try {
            System.out.println("Message Listen start");
            System.out.println("Message part "+message);
        }catch(Exception e){
            System.out.println(" message Exception " + e);
        }
    }
}

I have put 2 messages on SQS queue.when I try to fetch messages using this demo programme Messages shown Messages_in_flight column in my AWS console.but messages not reach to my sqsListener method and after few minutes messages shown to Messages_available column in AWS console.

Below is the Exception I got when run the programme.

QueueMessageHandler:294 - 1 message handler methods found on class com.sophos.cmr.demo.UserServiceListenr: {public void com.sophos.cmr.demo.UserServiceListenr.myQueueListener(java.lang.String) throws java.lang.Exception=org.springframework.cloud.aws.messaging.listener.QueueMessageHandler$MappingInformation@5f0e9815}

so what's going wrong if any clue?

Illia Lavryk Illia Lavryk · Accepted Answer · 2017-03-14T22:05:00

When you see that message move to column Messages_in_flight - it means that the message was picked up by a consumer but the acknowledgment about success handling, for this specific message, still didn`t receive.

So reason could be the next: 1) Error/Exception appears during the handling message from SQS 2) Spring can`t find appropriate ArgumentResolver to convert income message from SQS to your bean. I see you are using your custom bean - 'Message'

You can look through documentation, section 5.2.5

spring cloud AWS SQS Listener Issue

2 Answers