Http Error 503. The Service Is Unavailable. Sharepoint Site

[SajiIjiyemi]

Getting "HTTP Error 503. The service is unavailable" on a SharePoint site.

 

Web Server (IIS) report Error 5002: Application pool 'name of app pool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.

 

Also got lots of Warnings 5139. I will appreciate any help

 

IIS 7.0, Windows Server 2008 Standard.

[ICTCity]

Hi there,

 

Let's start from the end:

Waring 5139: http://technet.microsoft.com/en-us/library/cc560969(office.12).aspx

 

Error 5002 is usually related to the Windows Activation Service (WAS), but I can't tell you anything more until you tell me:

 

1) Have you made any modification before this error?

2) Can you post relevant event viewer's logs?

3) Are you able to start the service manually? If not, do you receive the same error? If yes, the error(s) in event viewer is/are the same?