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From Gary Tully <gary.tu...@gmail.com>
Subject Re: Failover-connection config halts start-up when no ActiveMQ available
Date Fri, 02 Jul 2010 09:06:24 GMT
There is a *startupMaxReconnectAttempts *option on the failover transport
that allow the transport to fail early on the first connect attempt so that
spring gets a chance to do retries rather than have the connection block
pending the broker start.

see: https://issues.apache.org/activemq/browse/AMQ-2385

On 2 July 2010 09:54, Arjen van der Meijden <acmmailing@tweakers.net> wrote:

> Hi,
>
> We have a simple single-server ActiveMQ-setup with multiple consumers, some
> of which use Java and connect via JMS. As the ActiveMQ-server might some
> times need a restart or some other down time we configured it to use the
> failover protocol (failover:tcp://localhost:61616), so it will reconnect as
> soon as its available again and will also keep the connection alive when
> there are long periods of silence.
>
> All this is managed via Spring's normal connection handling.
>
> This works fine, unless the ActiveMQ-server is not available during the
> initial start. Rather than just going into the background and waiting for
> the availability of a connection it blocks the start-up without any error
> message.
> In my case its a spring-managed Servlet that will receive some cache-update
> messages via jsm-topics. But rather than connecting in the background to
> activemq, the entire Tomcat-instance is blocked and although it will accept
> new http-connections, it will do absolutely nothing with them.
>
> My spring-configuration is like this:
>
> <bean id="amqfactory" class="o.a.activemq.ActiveMQConnectionFactory">
>  <constructor-arg value="" /> <!-- username -->
>  <constructor-arg value="" /> <!-- password -->
>  <constructor-arg value="failover:tcp://localhost:61616" /> <!-- broker -->
> </bean>
>
> <jms:listener-container connection-factory="amqfactory"
> destination-type="topic">
>  <jms:listener destination="some_topic" ref="someMessageListener" />
> </jms:listener-container>
>
> I'm not really sure what the best solution would be, but I'd expect to get
> some ERROR-message at the very least. It is the reason my application won't
> start indefinitely (or until activemq is started, whichever comes first).
> Its something you easily overlook during debugging and it is very hard to
> detect when you don't know what you're looking for (or even if you do, but
> just forget to check activemq is running and/or a connection is made).
> Logging should be possible, as I do get these kind of messages if it does
> work:
>
> 2010-07-02 09:36:00,095 [ActiveMQ Task] INFO
> o.a.activemq.transport.failover.FailoverTransport - Successfully connected
> to tcp://localhost:61616
>
> Perhaps the easiest fix would be to display a ERROR-message the first time
> it can't connect and than fall back to DEBUG-messages.
>
> Best regards,
>
> Arjen
>



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