| Author |
IHS crash because of too low threadsperchild value ?
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| Hi all,
These last days I've experienced a strange thing on my architecture:
WAS ND with a front IHS Web Server distributing the load between two WAS Servers (all on Windows 2003 boxes).
I have to websphere clusters: one per application. When I got my problem the first application was still up but the other one was not responding:
The IHS was throwing a "503 Service Temporarily Unavailable" error message, despite the IHS was up (the other application was available) and the application was also up in the was admin console...
I then tried to reboot the IHS windows service and the IHS Service threw some warnings "[Mon Mar 27 09:48:11 2006] [warn] NameVirtualHost myapp:0 has no VirtualHosts". I've checked my httpd.conf but my virtualhost myapp was there (note that it has been fu
nctionning perfectly for one year now).
Then the box went into an unexpected reboot... and after that...all was ok !!!
My thinking is that the threads per childs parameters might be too low regarding the fact that this app is a very light one but is accessed by many people(circa 2000 a day).
(this is a simple page with links in it redirecting to other apps on other boxes: I know this is not quite intelligent... a static page directly on the web server would have been better but I'm not deciding this point...)
I've read that increasing the threadsperchild value may not change anything... any idea about that ? Here are my current values:
IfModule mpm_winnt.c
ThreadLimit 2048
ThreadsPerChild 250
MaxRequestsPerChild 0
IfModule
Thanks a lot for any help.
Max.
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| Sunit Patke 2006-04-27, 8:21 am |
| Which version of WAS? Make sure that you have the latest WAS plug-in
installed.
Sunit
<m.heinisch@wyniwyg.com> wrote in message
news:1353934884.1143450133765.JavaMail.wassrvr@ltsgwas007.sby.ibm.com...
> Hi all,
>
> These last days I've experienced a strange thing on my architecture:
> WAS ND with a front IHS Web Server distributing the load between two WAS
> Servers (all on Windows 2003 boxes).
>
> I have to websphere clusters: one per application. When I got my problem
> the first application was still up but the other one was not responding:
>
> The IHS was throwing a "503 Service Temporarily Unavailable" error
> message, despite the IHS was up (the other application was available) and
> the application was also up in the was admin console...
>
> I then tried to reboot the IHS windows service and the IHS Service threw
> some warnings "[Mon Mar 27 09:48:11 2006] [warn] NameVirtualHost myapp:0
> has no VirtualHosts". I've checked my httpd.conf but my virtualhost myapp
> was there (note that it has been functionning perfectly for one year now).
>
> Then the box went into an unexpected reboot... and after that...all was ok
> !!!
>
> My thinking is that the threads per childs parameters might be too low
> regarding the fact that this app is a very light one but is accessed by
> many people(circa 2000 a day).
> (this is a simple page with links in it redirecting to other apps on other
> boxes: I know this is not quite intelligent... a static page directly on
> the web server would have been better but I'm not deciding this point...)
>
> I've read that increasing the threadsperchild value may not change
> anything... any idea about that ? Here are my current values:
> IfModule mpm_winnt.c
> ThreadLimit 2048
> ThreadsPerChild 250
> MaxRequestsPerChild 0
> IfModule
>
> Thanks a lot for any help.
>
> Max.
>
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| Hi,
Thanks you for responding.
The version of WAS is 5.1.1.7 (I'm on the point to upgrade to 5.1.1.8)
When you write the lastest plug-in you mean the last plug-in generated in the admin console and then export on the IHS box ?
Thanks !
Max.
| |
| Sunit Patke 2006-04-27, 8:21 am |
| IBM periodically publishes updated plug-in system code (cumulative fix) for
WAS.
http://www-1.ibm.com/support/docvie...s=utf-8&lang=en
Sunit
<m.heinisch@wyniwyg.com> wrote in message
news:1988028503.1143534469180.JavaMail.wassrvr@ltsgwas007.sby.ibm.com...
> Hi,
>
> Thanks you for responding.
>
> The version of WAS is 5.1.1.7 (I'm on the point to upgrade to 5.1.1.8)
>
> When you write the lastest plug-in you mean the last plug-in generated in
> the admin console and then export on the IHS box ?
>
> Thanks !
>
> Max.
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