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Forums / Set-up & Installation / App pool wont stay up in IIS7

App pool wont stay up in IIS7

14 posts, 0 answered
  1. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    I installed Sitefinity 3.7 and i click on the link to go to http://localhost/telerik/Sitefinity3.7 it gives me service unavailable. I had a look at my Application pools and it seems that the Classic .Net AppPool just dies when it runs in 32 bit mode. I am running the AppPool as LocalSystem and in the application log i get "The Module DLL C:\Windows\system32\inetsrv\rewrite.dll failed to load.  The data is the error."

    The Forums.iis.net has been down since yesterday afternoon and i need an answer on this. I am running IIS7 on Windows7 Ultimate. It is a developer machine so it might be possible that i caused this to happen by changing settings in IIS (I don't think i did but you never know?) Any help to get my Sitefinity to run?
  2. Ivan Dimitrov
    Ivan Dimitrov avatar
    16072 posts
    Registered:
    19 Sep 2016
    26 May 2010
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    Hello Jack Smit,

    You could take a look at this post Where did my IIS7 server go? Troubleshooting 503 "service unavailable" errors

    Regards,
    Ivan Dimitrov
    the Telerik team

    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.
  3. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    Thanks, i had a look at the article but could still not fix my issue.... my Application log error stated "The Module DLL C:\Windows\system32\inetsrv\rewrite.dll failed to load" I navigated to that path and the rewrite.dll is there, what else can I try? Forums.ii.net is down, i know this must be an IIS7 issue but i cannot wait indefinitely?
  4. Radoslav Georgiev
    Radoslav Georgiev avatar
    3370 posts
    Registered:
    01 Feb 2016
    26 May 2010
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    Hi Jack Smit,

    One of the most common reasons for this is that your server does not have enough free memory to load the component. You can try restarting the IIS or recycling application pool.

    Sincerely yours,
    Radoslav Georgiev
    the Telerik team

    Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.
  5. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    I rebooted my machine... only Firefox was running.... I did iisrest, the Classic .Net AppPool was running. As soon as i go to http://localhost the AppPool stops. I found a hint on forums.iis.net yesterday (before it went down) and it looks like it is related to the fact that i am trying to run it in 32 bit mode as per the Sitefinity documentation. The AppPool is fine if it runs as a 64 bit app?

    What else can i try?  I would post on forums.iis.net but that site is down? 
  6. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    I open task manager and there is no w3wp.exe*32........ i stopped all other AppPools and start only the Classic .Net AppPool.... as soon as i try to go to http://localhost/telerik/Sitefinity3.7 i can see the w3wp.exe*32 and it just stays there for about 3 seconds before it dies? What can I do?
  7. Richard Marr
    Richard Marr avatar
    3 posts
    Registered:
    26 May 2010
    26 May 2010
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    In event log entry  it  states "the data is in the error". Are there additional details in this error?. 
  8. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    No, that is it. I have tried to setup a new app pool to use and the moment i try to use the AppPool by browsing to the site the that AppPool stops.
  9. Richard Marr
    Richard Marr avatar
    3 posts
    Registered:
    26 May 2010
    26 May 2010
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    I would try using Process Monitor to see if that can tell you whats happening when it tries to load the dll.
    If should be loading from  here : C:\Windows\SysWOW64\inetsrv\rewrite.dll
  10. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    26 May 2010
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    Ok, I have Process Monitor from SysInternals, what should I set the filters for? I have no idea what I am looking for?
  11. Richard Marr
    Richard Marr avatar
    3 posts
    Registered:
    26 May 2010
    26 May 2010
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    Jack,
    Can you email me at rmarr at microsoft.com ?
    I'll look at your machine with you.
  12. Jack Smit
    Jack Smit avatar
    12 posts
    Registered:
    17 Jul 2012
    16 Sep 2010
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    The way I got the AppPool to stay alive is to go to the advanced setting of that Application pool and under "Process Model" set the Identity to "LocalSystem". Am not sure why this worked but it did...
  13. Rahat
    Rahat avatar
    1 posts
    Registered:
    05 Dec 2011
    05 Dec 2011
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    Check this dll failed post to get more info and solution about rewrite.dll error and any kind of dll errors..
  14. Vamsi
    Vamsi avatar
    1 posts
    Registered:
    11 Nov 2013
    11 Nov 2013
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    While there may be several reasons why this may occur, in this specific case, the 503 error was occurring because the Application pool failed to start. This was because the password was changed recently for the  Identity under which the application pool was trying to run. Fix was to go to the IIS Manager-> Application Pool -> Advanced Settings -> Process Model -> Identity and set the password to the new one.  It would also help to check the Event Viewer Logs(Event Viewer (Local) -> Windows Logs -> Application to look for specific causes of failure before proceeding to troubleshoot any further.

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14 posts, 0 answered