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| MQCONN ignores MQSERVER when application run as a cron job |
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| amacygnus |
 Posted: Mon Mar 14, 2011 3:16 am Post subject: MQCONN ignores MQSERVER when application run as a cron job |
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Newbie
Joined: 14 Mar 2011
Posts: 1
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Hi everyone,
I've got a MQ application written in C/C++ and I need it to run on a linux server at frequent intervals.
I've set up a MQSERVER env. variable which is picked up by the application when started. It runs, gets the messages and finishes.
The problem occurs when I specify the application to be run as a cron job, when it executes it fails with 2058 and the error log contains the following message:
"AMQ9518: File '/var/mqm/AMQCLCHL.TAB' not found.
EXPLANATION:
The program requires that the file '/var/mqm/AMQCLCHL.TAB' is present and
available.
ACTION:
This may be caused by invalid values for the optional environment variables
MQCHLLIB, MQCHLTAB or MQDATA. If these variables are valid or not set then
record the name of the file and tell the systems administrator who must ensure
that file '/var/mqm/AMQCLCHL.TAB' is available to the program.
"
As far as I know the TAB file shouldn't be picked up if MQSERVER is defined, i.e. it takes priority over it.
What could be the problem? Starting the app manually it does get MQSERVER but when started by cron it doesn't...
Any help would be much appreciated. Thanks. |
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| zpat |
| Posted: Mon Mar 14, 2011 3:58 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Why not use a CCDT?
Personally I see MQSERVER as a temporary overide facility. The CCDT can help with load balancing, reconnection, SSL and and avoids each MQ application having its own reference to the queue manager host and port etc.
You could set MQSERVER in the application start script (coding one if necessary) rather than the userid profile. Check that it is exported. But embedded this in the app or user profile is not best practice.
Support Pac MO72 makes creating a CCDT (on any platform) easy. |
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| mqjeff |
| Posted: Mon Mar 14, 2011 4:11 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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You can swap the use of MQSERVER for the use of the MQCLNT environment variables that point to a CCDT without change to the application, presumably.
The shell that a cron job runs under is NOT the same as the shell that a given user runs under when that user logs into an interactive session.
This is basic Unix sysadmin stuff - so ask your unix sysadmin. |
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| bruce2359 |
| Posted: Mon Mar 14, 2011 5:30 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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In answer to your specific question as to why the difference in behavior:
The MQSERVER environment variable is for a single instance of a shell. Create a shell script that sets (exports) the MQSERVER env variable before attempting to execute the application.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| gbaddeley |
| Posted: Mon Mar 14, 2011 2:33 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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| Quote: |
| The problem occurs when I specify the application to be run as a cron job, |
Is the cron job running a script or the app program binary?
If its running a script, just export the variable in the script. If its an app binary, export the variable in the user's logon profile.
_________________
Glenn |
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