Hi All,

Central admin application pool is auto stopping and throwing 503 error

EventLog error: The Module DLL C:\Windows\Microsoft.NET\Framework64\v4.0.30319\webengine4.dll failed to load.  The data is the error.

All the application pool are auto stopping and when we trying to open central admin getting 503 error.

If I start the app pool again it will auto stop.

and the event log erorr is The Module DLL C:\Windows\Microsoft.NET\Framework64\v4.0.30319\webengine4.dll failed to load.  The data is the error.

Its urgent.Can anyone please help on this.

Thanks in advance

Sunitha

Please Verify the credentials of appPool account which is used in Central admin. It might have been changed. 

Its a same acount we are using.

and I have manually changed the account to the same account which we have used for Central admin

Hi

make sure your password for service account is not expired. if not work  try to do iis reset.

Thanks for the reply Avni Bhatt

• Edited by Sunitha vv 58 minutes ago

Hi Rajendra,

Thanks

Password have not expired ,its a never expiry password 

Have done iis reset and restarted all services also .till it is not working

Regards

Sunitha

Thanks for the reply Avni Bhatt

• Edited by Sunitha vv 51 minutes ago

Hi

check whether  the App Pool set to support 32-bit applications.

Go

IIS manager, app pool, advanced settings, and set "Enable 32-bit applications" to "False".

see this if its help

http://weblog.west-wind.com/posts/2006/Dec/04/503-Service-Unavailable-in-IIS-7-watch-those-Application-Pools

Hi,

Ya I have cheked . "Enable 32-bit applications" is set to false.

Still it is not working.

Thanks

Sunitha

Hi 

couple of checks

1.check if the needed module is present in the system32\inetsrv folder. If it is absent then delete/comment the appropriate line in the system32\inetsrv\config\applicationHost.config in the globalModules section. Perhaps you will have to delete some modules (that also won't be found and pointed by event viewer) from your IIS application pool.

2.

1) Open IIS.

2) Right click on your Application-Pool for the web application and select "Advanced Settings".

3) Set "Rapid-Fail Protection" -> "Enabled" to False.

If this is true, the Application pool is shut down if there are a specified number of worker process crashes within a specified time period. By default, an application pool is shutdown if there are 5 crashes within a 5 minutes interval.

3.http://blogs.flexnetconsult.co.uk/colinbyrne/post/2012/11/11/RunningA32bitApplicationAlongsideSharePoint2013Problems.aspx

4.https://social.technet.microsoft.com/Forums/en-US/bfe0b2b0-7b50-4391-b076-bec14040504d/fixed-kb3037580-security-patching-4182015-application-pools-stopped?forum=sharepointgeneral

Thanks for the reply Avni Bhatt

• Edited by Sunitha vv Wednesday, April 29, 2015 6:45 AM

Hi,

Thanks Rajendra Singh

I have tried all the four option nothing worked out .

I have Run the web config .Then everything worked good.

Thanks & Regards

Sunitha.

• Marked as answer by Sunitha vv 1 hour 42 minutes ago