In SQS, a message a consumer has received is hidden from other consumers for the blank. If the consumer does not delete it before that ends, the message becomes visible and is blank.

Answer

In SQS, a message a consumer has received is hidden from other consumers for the visibility timeout. If the consumer does not delete it before that ends, the message becomes visible and is redelivered.

Also accepted: delivered again, retried for redelivered.

Why

Set the timeout longer than processing normally takes, or extend it while working, or slow messages will be processed twice in parallel.

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