<div dir="ltr">Hello everyone,<div><br></div><div>over the weekend we encountered a strange RabbitMQ issue, for which we are still trying to figure out what happened and why it happened. Our setup uses a single RabbitMQ instance (version 2.8.1), which serves a bunch of queues, most of which are persistent.</div>
<div><br></div><div>The RabbitMQ instance was running since May 2013 during which it processed > 250.000 messages without any issues. Over the weekend we had to restart our servers. After the server hosting the RabbitMQ instance came back up, RabbitMQ all of a sudden started re-delivering all messages that were processed in one of our persistent queues since May.</div>
<div><br></div><div>AFAIK, all messages had been properly ACKed before, so effectively RabbitMQ delivered these messages twice. They seem to be sitting inĀ /var/lib/rabbitmq/mnesia/rabbit@<server>/msg_store_persistent, though, which is around 0.5 GB in size on the affected server.</div>
<div><br></div><div>Any idea what may have happened?</div><div><br></div><div>Thanks,<br>Thilo</div></div>