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| Expired Messages and CURDEPTH |
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| gunter |
 Posted: Thu Oct 13, 2005 6:23 am Post subject: Expired Messages and CURDEPTH |
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Partisan
Joined: 21 Jan 2004
Posts: 307
Location: Germany, Frankfurt
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Hi,
I'm faced with a, at least for me, strange behavior on MQ 5.3 CSD07 on AIX 5.3.
As I know, and I verified it in the manuals, expired messages stay in the queue until a prozess tries a MQGET for this message. A MQGET with correlation-Id doesn't affect other messages than requestet.
I tried it an the behavior was different.
1. MQPUT with Expire 60 sek, without Correlation-Id
CURDEPTH is 1
2. MQGET with correlation-Id ( timeout 30 sec )
CURDEPTH is still 1
3. MQGET with correlation-Id after 80 seconds
CURDEPTH is still 1
4. MQGET with correlation-Id after four minutes
CURDEPTH is now 0
I'm working on a problem with (mqrc 2033) and like to know whether the messages never arrived or the messages expired.
Until this test I said, the messages never arrived, but now it looks as I have to change my mind.
Missed I something in the documents ?
Thanks.
Gunter
_________________
Gunter Jeschawitz
IBM Certified System Administrator - Websphere MQ, 5.3 |
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| jefflowrey |
| Posted: Thu Oct 13, 2005 6:29 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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It's apparently not guaranteed that expired messages won't get cleaned up behind the scenes.
The only guarantee is that you can't get an expired message.
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I am *not* the model of the modern major general. |
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| wschutz |
| Posted: Thu Oct 13, 2005 6:32 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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and you can always ask for a report message to be sent if a message expires
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-wayne |
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| hopsala |
| Posted: Thu Oct 13, 2005 7:00 am Post subject: |
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Guardian
Joined: 24 Sep 2004
Posts: 960
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We had a discussion about this a while back (Expired messages cleaning), and it was stated that if a queue is "loaded" (meaning it is opened or was opened recently) then some cleaning mechanism does work in the background; sadly, this is undocumented in 5.3 or 6 or anywhere, and remains out of our control completely.
Although it was stated then that this is strictly v6 behavior, your experiment denotes that this may apply to 5.3 CSD07 as well. A better desinged experiment would be beneficial here... (in other words "let someone else do it, i'm on vacation"  ) |
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