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From Marcus Zarra <mza...@mac.com>
Subject Re: Tomcat hang-up
Date Wed, 14 Jun 2006 06:38:46 GMT
Thanks, I will give this a go tomorrow and let you know what I discover.

On Jun 14, 2006, at 12:34 AM, James Strachan wrote:

> See
>
> http://incubator.apache.org/activemq/how-can-i-enable-detailed- 
> logging.html
>
> On 6/14/06, Marcus Zarra <mzarra@mac.com> wrote:
>> Thanks for the reply.  I am using a 4.0 build of ActiveMQ running on
>> Tomcat 4.x.  When this test is being run there are no external
>> connections to the broker other than from Tomcat.  Even in a
>> production environment there would not be more than 10.
>>
>> Is there any way to turn on additional logging so I can see what is
>> going on inside of ActiveMQ?  The reason I ask is that if I kill the
>> broker (which is embedded inside of a standalone server application)
>> then tomcat comes back to life with some errors complaining about the
>> connection being broken.  I would love to see what is stopping up the
>> works.
>>
>> BTW, The other "client" that connects to this broker that is not
>> inside of tomcat can talk with it just fine.
>>
>> I am stumped.
>>
>> Marcus
>>
>> On Jun 14, 2006, at 12:26 AM, James Strachan wrote:
>>
>> > BTW how many connections are being created? (Might be worth adding
>> > some logging).
>> > You could add some synchronization to ensure that you don't create
>> > lots of connections.
>> >
>> > On 6/14/06, James Strachan <james.strachan@gmail.com> wrote:
>> >> That code looks fine to me. I've no idea why this can be causing a
>> >> hang. Which version are you using?
>> >>
>> >> Does attempting to create a thread dump give you anything?
>> >>
>> >> On 6/13/06, Marcus Zarra <mzarra@mac.com> wrote:
>> >> > Hopefully this is a simple question that has been answered
>> >> before.  I
>> >> > am attempting to connect to an ActiveMQ broker from tomcat  
>> and the
>> >> > broker is running on another machine.  The tomcat version  
>> that is
>> >> > being used is old enough that I cannot put a context.xml in
>> >> place and
>> >> > access the broker via a context lookup.  Therefore I am simply
>> >> > attempting to connect to the broker inside of the init method  
>> for a
>> >> > servlet using the following code:
>> >> >
>> >> >          o = getServletContext().getAttribute 
>> ("queueConnection");
>> >> >          Connection connection;
>> >> >          if (o == null) {
>> >> >              String jmsURL = getServletContext 
>> ().getInitParameter
>> >> > ("JMS_URL");
>> >> >              log.info("URL is '" + jmsURL + "'");
>> >> >              ActiveMQConnectionFactory connectionFactory;
>> >> >              try {
>> >> >                  log.info("Connecting to JMS");
>> >> >                  connectionFactory = new  
>> ActiveMQConnectionFactory
>> >> > (jmsURL);
>> >> >                  log.info("Factory initialized");
>> >> >                  connection =  
>> connectionFactory.createConnection();
>> >> >                  log.info("Connection established");
>> >> >                  connection.start();
>> >> >                  log.info("Connection started");
>> >> >                  getServletContext().setAttribute
>> >> ("queueConnection",
>> >> > connection);
>> >> >              } catch (Throwable e) {
>> >> >                  log.error("Error initializing JMS  
>> Connection", e);
>> >> >                  throw new RuntimeException("Failed to
>> >> initialize JMS
>> >> > Connection");
>> >> >              }
>> >> >          } else {
>> >> >              connection = (QueueConnection)o;
>> >> >          }
>> >> >
>> >> >
>> >> > There is some additional things going on in the init method but
>> >> this
>> >> > is the area having an issue.  The issue is that the code  
>> stops dead
>> >> > on connection.start() every time and locks so hard that I  
>> need to
>> >> > kill -9 tomcat.
>> >> >
>> >> > Has anyone seen and/or resolved this issue before?  Or is  
>> there a
>> >> > cleaner/safer way to establish a connection to a broker from  
>> inside
>> >> > of a 4.x tomcat instance.
>> >> >
>> >> > Thanks,
>> >> >
>> >> > Marcus
>> >> >
>> >>
>> >>
>> >> --
>> >>
>> >> James
>> >> -------
>> >> http://radio.weblogs.com/0112098/
>> >>
>> >
>> >
>> > --
>> >
>> > James
>> > -------
>> > http://radio.weblogs.com/0112098/
>>
>>
>>
>>
>
>
> -- 
>
> James
> -------
> http://radio.weblogs.com/0112098/


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