Avoid reusing the same message group ID with virtual queues in Amazon SQS - Amazon Simple Queue Service
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Avoid reusing the same message group ID with virtual queues in Amazon SQS

When using virtual queues with a shared host queue, avoid reusing the same MessageGroupId across different virtual queues. If multiple virtual queues share the same host queue and contain messages with the same MessageGroupId, those messages can block each other, preventing efficient processing. To ensure smooth message processing, assign unique MessageGroupId values for messages in different virtual queues.