Off late the website hosted IIS 8 on our production server running windows server 2012 R2 is experiencing app pool crashes. It shoots up cpu usage and then finally crashes the app pool and once restarted, works fine until the next crash. The crashes are sporadic.
On further investigation found that the error is caused from the w3wp.exe.
Not yet, but are you suggesting that upgrading will take care of this problem? Because we have a fleet of applications which use a version lesser than this and some which use the same version. All the ones that use the same version do not show this behaviour, except one of them. This particular website handles considerably large traffic than the rest.
That's a very useful piece of information. This could the last piece of the puzzle. I have raised this with my infrastructure team. I shall keep this forum posted on the updates.
Finally i got my infra team to implement the suggested fix. We put back the website in question back on the server and enabled the WAF module to start receiving requests and redirect acorrdingly. But unfortunately problem still persists. CPU usage went soaring high no sooner than we put it back online. And finally we had to shut it down and let it run on a server of its own.
What we are trying now is, running it alongside other solutions on the same server but not allowing external traffic. But interally load test it to see if we see the same response.
I shall keep you posted. But is there anything that you think we can try differently?
Umbraco app pool crash clr.dll
Hi,
Off late the website hosted IIS 8 on our production server running windows server 2012 R2 is experiencing app pool crashes. It shoots up cpu usage and then finally crashes the app pool and once restarted, works fine until the next crash. The crashes are sporadic.
On further investigation found that the error is caused from the w3wp.exe.
When probed into the process and the threads that are holding up cpu memory found this stack trace from one of the thread.
The application is running Umbraco 7.1.8 version.
Hi Prashanth
Are you considering upgrading Umbraco to latest one?
/Alex
Hi Alex,
Not yet, but are you suggesting that upgrading will take care of this problem? Because we have a fleet of applications which use a version lesser than this and some which use the same version. All the ones that use the same version do not show this behaviour, except one of them. This particular website handles considerably large traffic than the rest.
Please advice.
Cheers!
Hi Prashanth,
Please also make sure that you NOT are affected by http://issues.umbraco.org/issueMobile/U4-6338
All the best,
/Dennis
Hi Dennis,
That's a very useful piece of information. This could the last piece of the puzzle. I have raised this with my infrastructure team. I shall keep this forum posted on the updates.
Thanks!
Hi Prashanth
Great to heat that this could be useful information for you guys.
Keep me updated
/Dennis
Hi Dennis,
Finally i got my infra team to implement the suggested fix. We put back the website in question back on the server and enabled the WAF module to start receiving requests and redirect acorrdingly. But unfortunately problem still persists. CPU usage went soaring high no sooner than we put it back online. And finally we had to shut it down and let it run on a server of its own.
What we are trying now is, running it alongside other solutions on the same server but not allowing external traffic. But interally load test it to see if we see the same response.
I shall keep you posted. But is there anything that you think we can try differently?
Thanks, Prashanth
Hi Prashanth,
Could it be something similar to this that you are seen http://issues.umbraco.org/issue/U4-6292
Then you should upgrade to at least version 7.3.2
Hope this helps,
/Dennis
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