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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Tomcat hang-up
Date Wed, 14 Jun 2006 06:34:14 GMT
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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