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| jim |
 Posted: Sat Mar 29, 2014 1:26 am Post subject: security exit |
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Voyager
Joined: 26 Nov 2013
Posts: 94
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If the SVRCONN is running and we need to update the security exit file.
The above task have any chance to impact channel process. |
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| PeterPotkay |
| Posted: Sat Mar 29, 2014 3:13 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Yes.
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Peter Potkay
Keep Calm and MQ On |
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| jim |
| Posted: Sat Mar 29, 2014 4:33 am Post subject: |
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Voyager
Joined: 26 Nov 2013
Posts: 94
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I such case we need to stop the channel and then proceed ?  |
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| PaulClarke |
| Posted: Sat Mar 29, 2014 4:56 am Post subject: |
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Grand Master
Joined: 17 Nov 2005
Posts: 1002
Location: New Zealand
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You can not change any channel exits dynamically - ie a running channel will not somehow magically pick up a new channel exit and start running with it. Generally speaking chaos would ensure if it did.
To pick up a new exit the channel must be stopped and restarted.
Cheers,
Paul.
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Paul Clarke
MQGem Software
www.mqgem.com |
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| jim |
| Posted: Sun Mar 30, 2014 7:07 am Post subject: |
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Voyager
Joined: 26 Nov 2013
Posts: 94
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| PaulClarke wrote: |
You can not change any channel exits dynamically - ie a running channel will not somehow magically pick up a new channel exit and start running with it. Generally speaking chaos would ensure if it did.
To pick up a new exit the channel must be stopped and restarted.
Cheers,
Paul. |
Hi Paul
Can we alter the sycdata attibute on the channel without changing the config files
It will also impact. |
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| bruce2359 |
| Posted: Sun Mar 30, 2014 7:19 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9470
Location: US: west coast, almost. Otherwise, enroute.
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| jim wrote: |
Can we alter the sycdata attibute on the channel without changing the config files
It will also impact. |
You can change channel attributes at any time, but changes will not take effect until the channel is stopped/started.
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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 31, 2014 1:19 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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Stopped, or goes INACTIVE....
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Glenn |
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| PaulClarke |
| Posted: Mon Mar 31, 2014 1:38 pm Post subject: |
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Grand Master
Joined: 17 Nov 2005
Posts: 1002
Location: New Zealand
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Neither 
The channel has to be not running which is not necessarily either of those.
Of course if a channel is INACTIVE (ie not reported by DIS CHS(*)) then the channel is not running. However, a channel can well be running even though it is in STOPPED status. You can always query the value of MCASTAT to see whether the channel is running.
Cheers,
Paul.
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Paul Clarke
MQGem Software
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| gbaddeley |
| Posted: Wed Apr 02, 2014 1:25 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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The exit is loaded into the MCA thread for a new channel instance at initialization, and stays with the channel instance until it terminates ???
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Glenn |
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| PaulClarke |
| Posted: Wed Apr 02, 2014 1:31 pm Post subject: |
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Grand Master
Joined: 17 Nov 2005
Posts: 1002
Location: New Zealand
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Yes, pretty much. The channel loads the channel shared library and resolves the entry point address. The library isn't generally unloaded until the channel ends. You can see when this all happens by looking at an MQ channel trace.
Cheers,
Paul.
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Paul Clarke
MQGem Software
www.mqgem.com |
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| tczielke |
| Posted: Thu Apr 03, 2014 4:54 am Post subject: |
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Guardian
Joined: 08 Jul 2010
Posts: 941
Location: Illinois, USA
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On Unix/Linux the lsof command (or its equivalent) could also be helpful for tracking the exit.
For example, let's say we have the logip exit in /var/mqm/exits64 and it currently has an inode of 131122.
mqm$ pwd
/var/mqm/exits64
mqm$ ls -i logip
131122 logip
You can run the following lsof command to see what processes currently have the exit loaded. Note to that the inode being reported is 13112.
mqm$ lsof -u mqm | grep logip
amqrmppa 29210 mqm mem REG 253,7 8550 131122 /var/mqm/exits64/logip
After shutting down your channels, you can run another lsof to confirm that no mqm processes have the logip exit loaded.
mqm$ lsof -u mqm | grep logip
mqm$
Make your update now to your logip exit, and note if the inode did change. In this case, it changed to 131125.
mqm$ pwd
/var/mqm/exits64
mqm$ ls -i logip
131125 logip
Now start your channels again, and your lsof command should show that the new logip (with the new inode) is being executed.
NOTE: It is possible to not get a different inode number when you change the exit file.
mqm$ lsof -u mqm | grep logip
amqrmppa 29210 mqm mem REG 253,7 8550 131125 /var/mqm/exits64/logip
If your environment is Windows, the freeware Sysinternals Process Explorer tool would be very helpful for this type of check, as well. |
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