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MQSeries.net Forum IndexIBM MQ Java / JMSJMS client not notified of lost connection

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msrini_1
PostPosted: Fri Oct 05, 2001 7:19 am Post subject: Reply with quote

Newbie

Joined: 03 Oct 2001
Posts: 1

Hi,

I am using MQSeries 5.2 with JDK 1.3.1 with the required JMS supportpacs (MA88, MA0C) installed and with the PubSub setup already done. I am able to run successfully a
simple message flow with a few publishers and a few subscribers and everything seems to work fine. For all the topic connections created, I am setting a JMSException listener so that they will be notified of problems. However, when I shutdown the broker while the JMS clients are still running, only the connections that were used to create subscribers are being notified of the lost broker connection while the connections that were used to create publishers are not being notified. (Of course, if the publisher tries
to publish a message after the broker is shutdown, it throws some kind of exception but I would like to detect this condition even before trying to publish a message, since in my situation I cannot control when a message will be published). Is there a reason why the connections are behaving differently and is there a way I can have all the connections notified when the broker connection is lost ?

I tried reducing the heartbeat interval on the server connection channel that I'm using, but that did not help.

Thanks for your help,
Srini
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EddieA
PostPosted: Fri Oct 05, 2001 8:28 am Post subject: Reply with quote

Jedi

Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles

Srini,

This is the way that it works in all the APIs, not just JMS.

MQSeries can only notify clients that it is shutting down when a call to MQ is made.

As you have an Exception listener, I will guess that you are using Message listener to get the Subscriptions. This, internally, has an 'MQGET with wait' active. Hence a shutdown notification can be posted.

The Publisher, on the other hand, is between MQSeries calls when the shutdown is issued. You are then notified, as you have seen, when the next MQ action is attempted.

Cheers.

_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0
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