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| DeadletterQueue and BackoutQueue |
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| anupama |
 Posted: Sat Aug 02, 2008 2:27 am Post subject: DeadletterQueue and BackoutQueue |
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Novice
Joined: 03 Apr 2008
Posts: 19
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Hi
What is Diffrence between DeadletterQueue and Backoutqueue
What is purpose of backoutqueue. |
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| mrgate |
| Posted: Sat Aug 02, 2008 3:02 am Post subject: Re: DeadletterQueue and BackoutQueue |
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Centurion
Joined: 28 Feb 2007
Posts: 141
Location: India
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| anupama wrote: |
Hi
What is Diffrence between DeadletterQueue and Backoutqueue
What is purpose of backoutqueue. |
Please go through websphere MQ documentation.
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| bruce2359 |
| Posted: Sat Aug 02, 2008 5:25 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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There is a qmgr attribute (DEADQ). If you enter the name of the local queue you want to use as a dead letter queue, the qmgr will put messages that it can't otherwise deliver. In distributed queuing, if the message cannot be delivered to the destination queue by the message channel agent, the message will be put to the dlq.
A local queue has an attribute 'backout requeue queue name'. Your application is responsible for its use. This fields tells your app into which queue should it put a 'poisen message', a message that doesn't meet business specifications. There is another attribute 'backout count'. Your app can inquire on this field to determine if the next message in the queue has been backed out (MQBACK) before.
These are well documented in the WMQ Application Programming Referene, the WMQ Application Programming Guide, and WMQ Intercommunications manual (dead letter queue).
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