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https://issues.apache.org/jira/browse/AMQ-9748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18010640#comment-18010640
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Lionel Cons commented on AMQ-9748:
----------------------------------
The connections to the broker use STOMP so the problem might be protocol
specific.
Here are the connectors we use:
{code}
<transportConnectors>
<transportConnector name="stomp"
uri="stomp+nio://0.0.0.0:6113?transport.closeAsync=false&transport.defaultHeartBeat=3600000,0&transport.hbGracePeriodMultiplier=1.5&transport.keepAlive=true&transport.soLinger=1"/>
<transportConnector name="stomp+ssl"
uri="stomp+ssl://0.0.0.0:6123?transport.closeAsync=false&transport.defaultHeartBeat=3600000,0&transport.enabledProtocols=TLSv1,TLSv1.1,TLSv1.2&transport.hbGracePeriodMultiplier=1.5&transport.keepAlive=true&transport.needClientAuth=true&transport.soLinger=1"/>
</transportConnectors>
{code}
> Incorrect CurrentConnectionsCount metric
> ----------------------------------------
>
> Key: AMQ-9748
> URL: https://issues.apache.org/jira/browse/AMQ-9748
> Project: ActiveMQ Classic
> Issue Type: Bug
> Affects Versions: 6.1.5
> Reporter: Lionel Cons
> Priority: Major
>
> 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}
> # jolokia http://localhost:61705/api/jolokia read
> 'org.apache.activemq:type=Broker,brokerName=*' CurrentConnectionsCount
> {"org.apache.activemq:brokerName=lhcb_mb129.cern.ch,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)
> disagrees.
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