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From "Timothy Bish (Resolved) (JIRA)" <>
Subject [jira] [Resolved] (AMQNET-379) Consumers frequently fail to reconnect after broker outage/failover.
Date Fri, 13 Apr 2012 18:16:17 GMT


Timothy Bish resolved AMQNET-379.

    Resolution: Fixed

Fixed on trunk and the 1.5.x branch
> Consumers frequently fail to reconnect after broker outage/failover.
> --------------------------------------------------------------------
>                 Key: AMQNET-379
>                 URL:
>             Project: ActiveMQ .Net
>          Issue Type: Bug
>          Components: ActiveMQ
>    Affects Versions: 1.5.3
>         Environment: brokers 5.4.2, 5.6-snapshot and 5.5.1-fuse-03-06
> Apache.NMS.ActiveMQ v1.5.3
> Windows7 64bit, .Net 4
> Java 64bit 1.6.0_31, -server VM
>            Reporter: Tom
>            Assignee: Timothy Bish
>             Fix For: 1.5.5, 1.6.0
>         Attachments: activemq.xml
> When using the failover transport we frequently see consumers fail to reconnect after
failover between brokers or a broker outage.  This behaviour is something we have been able
to easily replicate in a test environment.
> The failure seems exagerated when connecting to a remote broker, we've tried to replicate
it running the producers and consumers on the same local host but with no joy.
> Processes/connections that work purely as producers don't experience the same problem.
In our tests frequently failing can cause all consumers to disconnect.  The failure doesn't
occurr unless broker is under load i.e. when producers must be active for failure to occur.
> The NMS client's connection threads and failover threads appear to have died/ended after
a consumer fails to failover.
> Broker config is attached.
> Client connections use AsyncSend = true and have WatchTopicAdvisories = false (to avoid
AMQNET-371). We've also tested this with and without DispatchAsync = true .
> Error messages - nothing obvious in NMS Trace or broker logs though we have on occasion
whilst performing this test seen the messages detailed in AMQNET-370.
> Test code available at
> To run:
> - compile with VS2010
> - edit App.config in NmsFailoverTest project to point Broker1Address to a valid broker
address on a different box.
> - configure Broker2Address to point to a second broker or a non-existent broker.
> - run the NmsFailoverTest project
> - producer stats will appear on console and periodically the broker will be queried for
the number of consumer it sees, this will be printed to the console (assumes broker with <statisticsBrokerPlugin/>
> - repeatedly stop and start Broker1 and witness the decline in consumers after some failovers

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