Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. It allows you to send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available.
When working with AWS SQS, you might encounter the error code AWS.SimpleQueueService.MessageNotInflight. This error typically occurs when you attempt to change the visibility timeout of a message that is not currently being processed.
Developers often see this error when they try to modify the visibility of a message that has already been processed or has not yet been received by a consumer.
The error AWS.SimpleQueueService.MessageNotInflight indicates that the message you are trying to modify is not in flight. In SQS, a message is considered 'in flight' when it has been received by a consumer but not yet deleted or its visibility timeout has not expired.
This error occurs because the message is not currently being processed. It may have already been processed, or it might not have been received by any consumer yet.
To resolve this issue, ensure that the message is in flight before attempting to change its visibility. Here are the steps you can follow:
Ensure that the message has been received by a consumer. You can do this by checking your application logs or using AWS CloudWatch to monitor message processing.
When changing the visibility timeout, make sure you are using the correct receipt handle. The receipt handle is a unique identifier for the message once it has been received by a consumer. You can obtain it from the response of the ReceiveMessage API call.
aws sqs receive-message --queue-url --max-number-of-messages 1
Use the receipt handle from the above command to change the visibility timeout:
aws sqs change-message-visibility --queue-url --receipt-handle --visibility-timeout
Utilize AWS CloudWatch to set up alarms and logs to monitor the processing of messages. This can help you identify when messages are in flight and when they are not.
For more information on handling messages in AWS SQS, refer to the following resources:
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