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activemq-artemis
BenW
BenW

Reputation: 959

Negative message count on ActiveMQ Artemis

In ActiveMQ Artemis 2.14.0 what does it mean if I see a negative message count in the web console? The server recently crashed from high heap usage. I'm trying to solve that. I restarted Artemis but I can't find anything in the docs about negative message counts.

Upvotes: 0

Views: 701

Answers (2)

Telvanis
Telvanis

Reputation: 55

Hey just in case somebody else has this problem and is trying to solve it; After a crash of our host system which also caused the Artemis-VM to fall down, we had -120 messages in queue (we are running ActiveMQ Artemis 2.15.0).

I managed to solve this bug by purging the queue in the Web UI and restarting the service. We didn't lose a single message and the counter is now positive (or zero) :)

Maybe this will help you too. Another idea would've been a deletion of the queue, because it'll be recreated after a restart as long as it is defined in the broker.xml. Im pretty certain, this would've helped as well.

Upvotes: 0

Justin Bertram
Justin Bertram

Reputation: 35008

A negative message count is almost always the result of a bug or perhaps the corruption of internal state due to a JVM issue (e.g. running out of heap). There's no documentation on it because it shouldn't happen. If you encounter this situation during normal operation file a bug report in the ActiveMQ Artemis Jira. Please include a full description of the use-case and a reproducer if possible.

Upvotes: 1

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