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https://issues.apache.org/jira/browse/ARTEMIS-2969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17223686#comment-17223686
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Robbie Gemmell commented on ARTEMIS-2969:
-----------------------------------------
The latest fix means the broker does notice the connection going down
immediately which is good, however it also introduces a new problem behaviour.
It seems like each time it disconnects it creates an extra additional new
connection on trying to reconnect. E.g in testing, I've got one
server-connection configured, but after a number of restarts on the peer I now
have traffic logs froming from 4 separate broker connections. As soon as I
discconnected it, it logged twice that it was doing 'retry 2 of -1' (i.e it
skipped logging retry 1). I stopped and started the router a few more times and
ended up with yet more connection logs. I can see the live traffic going for
them all on a protocol trace (broker + router) so they really are actually
there.
E.g on shutting the router down in this state, it logged:
{noformat}
2020-10-30 14:35:19.403646 +0000 ROUTER_CORE (info) Router Core thread exited
2020-10-30 14:35:19.403807 +0000 ROUTER_CORE (info) Finalizing core module:
streaming_link_scruber
2020-10-30 14:35:19.403834 +0000 ROUTER_CORE (info) Finalizing core module:
stuck_delivery_detection
2020-10-30 14:35:19.403842 +0000 ROUTER_CORE (info) Finalizing core module:
address_lookup_client
2020-10-30 14:35:19.403875 +0000 SERVER (info) [C1] Closing connection on
shutdown
2020-10-30 14:35:19.403915 +0000 SERVER (info) [C2] Closing connection on
shutdown
2020-10-30 14:35:19.403925 +0000 SERVER (info) [C3] Closing connection on
shutdown
2020-10-30 14:35:19.403929 +0000 SERVER (info) [C4] Closing connection on
shutdown
[0x23cd9b0]: AMQP:FRAME:0 -> @close(24) [error=@error(29)
[condition=:"amqp:connection:framing-error", description="connection aborted"]]
[0x23cd9b0]: IO:FRAME: <- EOS
[0x2396bd0]: AMQP:FRAME:0 -> @close(24) [error=@error(29)
[condition=:"amqp:connection:framing-error", description="connection aborted"]]
[0x2396bd0]: IO:FRAME: <- EOS
[0x231b3b0]: AMQP:FRAME:0 -> @close(24) [error=@error(29)
[condition=:"amqp:connection:framing-error", description="connection aborted"]]
[0x231b3b0]: IO:FRAME: <- EOS
[0x2314620]: AMQP:FRAME:0 -> @close(24) [error=@error(29)
[condition=:"amqp:connection:framing-error", description="connection aborted"]]
{noformat}
While the broker was logging:
{noformat}
2020-10-30 14:36:04,423 INFO
[org.apache.activemq.artemis.protocol.amqp.logger] AMQ111002:
*******************************************************************************************************************************
Retrying Server AMQP Connection my-router on localhost:6000 retry 46 of -1
*******************************************************************************************************************************
2020-10-30 14:36:04,424 INFO
[org.apache.activemq.artemis.protocol.amqp.logger] AMQ111002:
*******************************************************************************************************************************
Retrying Server AMQP Connection my-router on localhost:6000 retry 47 of -1
*******************************************************************************************************************************
2020-10-30 14:36:04,426 INFO
[org.apache.activemq.artemis.protocol.amqp.logger] AMQ111002:
*******************************************************************************************************************************
Retrying Server AMQP Connection my-router on localhost:6000 retry 48 of -1
*******************************************************************************************************************************
2020-10-30 14:36:04,427 INFO
[org.apache.activemq.artemis.protocol.amqp.logger] AMQ111002:
*******************************************************************************************************************************
Retrying Server AMQP Connection my-router on localhost:6000 retry 49 of -1
*******************************************************************************************************************************
2020-10-30 14:36:04,429 INFO
[org.apache.activemq.artemis.protocol.amqp.logger] AMQ111002:
*******************************************************************************************************************************
Retrying Server AMQP Connection my-router on localhost:6000 retry 50 of -1
*******************************************************************************************************************************
{noformat}
It appears the (now 5) different connections end up sharing the same reconnect
counter (which perhaps also explains the initial 'retry 2' thing I noted
seeing).
> broker doesnt handle server-connection being severed
> ----------------------------------------------------
>
> Key: ARTEMIS-2969
> URL: https://issues.apache.org/jira/browse/ARTEMIS-2969
> Project: ActiveMQ Artemis
> Issue Type: Bug
> Affects Versions: 2.16.0
> Reporter: Robbie Gemmell
> Assignee: Clebert Suconic
> Priority: Major
> Fix For: 2.16.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The broker doesnt notice or handle a server-connection being severed / timing
> out.
> Start a broker, having instructed it to connect to a router (i.e 'peer'
> configuration). Stop the router (CTRL-C). Start the router again. Broker
> doesnt seem to notice the server-connection is gone and doesnt reconnect. It
> actually sits generating heartbeat frames until its 60sec actual-timeout is
> reached...at which point proton generates a close frame indicating the
> timeout. The broker still doesnt notice the connection is gone, and still
> doesnt reconnect.
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