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https://issues.apache.org/jira/browse/AMQ-9748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18030635#comment-18030635
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Jean-Baptiste Onofré commented on AMQ-9748:
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I think it's related to the client. I suspect STOMP clients are not handled
correctly.
> Incorrect CurrentConnectionsCount metric
> ----------------------------------------
>
> Key: AMQ-9748
> URL: https://issues.apache.org/jira/browse/AMQ-9748
> Project: ActiveMQ Classic
> Issue Type: Bug
> Components: JMX
> Affects Versions: 6.1.5
> Reporter: Lionel Cons
> Assignee: Jean-Baptiste Onofré
> Priority: Major
> Fix For: 6.2.0, 6.1.9
>
>
> In some cases, the current number of connections (as reported via JMX) is not
> correct.
> We did not find any easy way to reproduce the problem. It seems to happen
> when there are some rapid re-connections from the client side. Then the
> counter stays wrong (too high) until the broker is restarted.
> Here is for instance what can currently be seen on one broker:
> {code:java}
> # jolokia http://localhost:6105/api/jolokia read
> 'org.apache.activemq:type=Broker,brokerName=*' CurrentConnectionsCount
> {"org.apache.activemq:brokerName=foo.acme.org,type=Broker":{"CurrentConnectionsCount":4955}}
> # netstat --tcp -n | grep ESTABLISHED | wc -l
> 63
> {code}
> So ActiveMQ reports 4955 active/current connections but the OS (Linux here)
> strongly disagrees.
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