Monday, September 17, 2012

Service Unavailable – HTTP Error 503. (SharePoint 2010)

When you try to load the page you probably might end up with following error:
Service Unavailable – HTTP Error 503

First Shot

Check Application Pool, most probably it will be turned off. Turn it on and test the portal.


If App Pool shuts down once more than

Second Shot 


Check the eventvwr
I had following error message:(not pasting the whole message but the important pointer)

The exception message is: Exception has been thrown by the target of an invocation.. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.InvalidOperationException: The farm is unavailable. at Microsoft.SharePoint.Administration.Claims.SPSecurityTokenServiceManager.


If your error message is same as mine then try this resolution:

Open Application Pool - > Advanced Settings - > Enable 32 Bit Application and Set to FALSE


Hope that fixes your error.

Have Fun!!!




1 comment:

Mani Kandan said...

Apart from 32 bit support, There are few more reasons for Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint, like Password expiry and Application Pool in Stopped status.

Found this checklist to resolve this error in SharePointDiary.com -
Service Unavailable: HTTP Error 503. The service is unavailable in SharePoint