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| tapak |
 Posted: Thu Nov 02, 2006 2:41 pm Post subject: How to disconnect gracefully on killing a Java Application |
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Centurion
Joined: 26 Oct 2005
Posts: 149
Location: Hartford,CT
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Is there a way to disconnect from MQ on killing the Java standalone application in Unix . When I kill a Java client application connecting to MQ ( using kill command in unix ) , the server connection channels still seems to be running. Is there a way to disconnect from MQ gracefully on killing the process.
Does the finalize method serve the purpose.? |
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| fjb_saper |
| Posted: Thu Nov 02, 2006 3:48 pm Post subject: Re: How to disconnect gracefully on killing a Java Applicati |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| tapak wrote: |
Is there a way to disconnect from MQ on killing the Java standalone application in Unix . When I kill a Java client application connecting to MQ ( using kill command in unix ) , the server connection channels still seems to be running. Is there a way to disconnect from MQ gracefully on killing the process.
Does the finalize method serve the purpose.? |
If the JVM does a graceful shutdown the finalize method may be used to clean up all outstanding resources.
The proper way of your application should be to only keep the resource as long as it is truely needed, and to allow for some graceful shutdown...
If you need to kill -9 the JVM the only way to kill the resource is by checking the qmgr:
see queue status and display connection.
Enjoy 
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MQ & Broker admin |
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| tapak |
| Posted: Fri Nov 03, 2006 6:45 am Post subject: |
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Centurion
Joined: 26 Oct 2005
Posts: 149
Location: Hartford,CT
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Hi fjb_saper,
Thanks for the info. You have explanations for all my problems with mq and Java. You are the best. |
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| tapak |
| Posted: Fri Nov 03, 2006 7:02 am Post subject: |
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Centurion
Joined: 26 Oct 2005
Posts: 149
Location: Hartford,CT
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| Is there a way to gracefully shutdown the JVM for a standalone application. |
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| fjb_saper |
| Posted: Fri Nov 03, 2006 2:48 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| tapak wrote: |
| Is there a way to gracefully shutdown the JVM for a standalone application. |
| Code: |
| System.exit(0); //from memory |
But before calling this snippet I would try to clean up all resources 
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| JLRowe |
| Posted: Wed Nov 08, 2006 3:03 am Post subject: |
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Yatiri
Joined: 25 May 2002
Posts: 664
Location: South East London
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Yes, the return statement!
| tapak wrote: |
| Is there a way to gracefully shutdown the JVM for a standalone application. |
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| tapak |
| Posted: Wed Nov 08, 2006 8:38 am Post subject: |
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Centurion
Joined: 26 Oct 2005
Posts: 149
Location: Hartford,CT
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Sorry. I didnt made my question clear.
I am having a standalone java application started as a background process in Unix which listens to a queue . Is there a way to stop the application other than using kill -9 which will gracefully shutdown the JVM. |
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| jefflowrey |
| Posted: Wed Nov 08, 2006 9:37 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Yes.
Write your program to accept a message that tells it to gracefully shut down.
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I am *not* the model of the modern major general. |
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| tapak |
| Posted: Wed Nov 08, 2006 10:59 am Post subject: |
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Centurion
Joined: 26 Oct 2005
Posts: 149
Location: Hartford,CT
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| Thanks Jeff. That is a great idea. |
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