Sometimes when we are working on sharepoint 2010 we get a problem in Central Administration showing that as:
SharePoint 2010 – HTTP Error 503 Service Unavailable
To solve that we can do the following ations:
Q) So what is 503 error in general?
A) 503 (service unavailable).
The 503 Service Unavailable HTTP status code means the web site’s server is simply not available at the moment.
503 errors are usually due to a temporary overloading or maintenance of the server.
Coming to Sharepoint server 2010
Check the application pool. If it is disabled it caused due to crashes a couple of times You need to manually reenable the application pool in IIS Manager – that should resolves the problem.
Thanks to Stefan Gobner,Microsft.