Peter,
If the server crashes, it doesn't matter. If MQ crashes, then I suppose it
could prove useful to run amqiclen or mqipcrm it at the head of the startup
script. Unless there's some exposure/problem with residual shared memory
segments and semaphores, running the cleanup before starting MQ might be
better. But, if your script doesn't detect and abort the startup, raise an
alert, if either amqiclen or mqipcrm returns a bad return code, you could
see your queue manager fail. I guess the question is when you want to
notified of a problem with amqiclen/mqipcrm.
"Potkay, Peter M
(PLC, IT)" To: [EMAIL PROTECTED]
<[EMAIL PROTECTED] cc:
RTFORD.COM> Subject: Re: amqiclen question
Sent by: MQSeries
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<[EMAIL PROTECTED]
AC.AT>
04/21/2004 09:50 AM
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Where do you guys put amqiclen or mqipcrm.sh?
I was thinking of putting it at the head of my startup scripts as well as
the end of the shutdown scripts. If the server / QM crashes and the
shutdown
script never runs, there is a chance that there will be leftover shared
memory and segments that may interfere with the QM coming back up. Or is
this overkill?
-----Original Message-----
From: Rick Tsujimoto [mailto:[EMAIL PROTECTED]
Sent: Thursday, April 15, 2004 10:53 AM
To: [EMAIL PROTECTED]
Subject: Re: amqiclen question
Bill,
It's been around for awhile, but never seemed to made to the admin manual:
Here is item RTA000170159 concerning your inquiry:
Source..........: PDDBR PDDBR
Last updated....: 20010724
Abstract........: AMQICLEN HANG HUNG CLEANUP SHMEM SEMAPHORES CHKMQIPC
USERS: ALL USERS with MQSeries HPUX HP
PROBLEM SUMMARY:
Cust wants to discuss methods for cleaning up shared memory
and semaphores particularly in their shutdown scripts where they
have to bring down a queue manager manually by killing off processes.
In
5.1 they have been using a script developed by Hursley called
chkmqipc because they could use it to clean up ipc resources from one
queue manager on a machine where another queue manager was still
running (without having to end that other queue manager). In 5.2 we
had suggested they used the utility supplied with the product called
amqiclen. Cust is having problems trying to use it.
SOLUTION:
If there is no documentation, then the utility is probably in the
'unsupported' category, i.e. it is intended for use by MQ support and
has been issued so it is already installed should support require it
for any purpose. It is not really intended for customer use. There
are other 5.2 utilities like this, for authorizations, cluster and
channel debugging.
It is not necessary to clear IPC resources if MQ is ended normally,
nor at 5.2 should it be necessary if MQ is ended abnormally or
abruptly. CHKMQIPC should indeed continue to work at 5.2. However
either 5.2 or PB may be cleaning up IPC stuff so chkmqipc has no work
to do.
The command line for amqiclen is:
amqiclen -v -c -m qmgr_name < /var/mqm/mqs.ini
.
-v => verbose
-c => check only (does not ipcrm anything)
-m => only to clean up named queue manager
.
returns:
0 => OK
2 => One or more connected process(es)
>2 => unexpected error
Note: if the input redirection is omitted, the
< /var/mqm/mqs.ini, then amqiclen will 'hang' waiting for input.
Once cust used the correct syntax for the amqiclen command it did
work as desired.
Bill Anderson
<[EMAIL PROTECTED] To:
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<[EMAIL PROTECTED]
en.AC.AT>
04/15/2004 09:16
AM
Please respond
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We are an AIX shop, but I use mqipcrm, which is a fairly simple "K shell"
script. I run it every time I bring a qmgr down with out bouncing the
machine. I believe It was written by an IBM support person, and the are the
ones that gave it to me a year ago or so. It takes no flags at all, and
seems to work fine.
I have never heard of amqiclen, perhaps I should consider taking a look at
it?
Cheers
Rick Tsujimoto
<[EMAIL PROTECTED] To:
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.CANON.COM> cc:
Sent by: MQSeries List Subject: amqiclen
question
<[EMAIL PROTECTED]>
04/14/2004 02:59 PM
Please respond to MQSeries
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I've used amqiclen for HP-UX, but on AIX there seems to be a different set
of switches. What switches should be set to routinely get rid of any
shared memory segments and semaphores when MQ is brought down?
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