Tuesday, February 26, 2008

Server Application Unavailable

Server Application Unavailable

The web application you are attempting to access on this web server is currently unavailable. Please hit the "Refresh" button in your web browser to retry your request.

Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur.

Today morning, I got the same error in my ASP.Net application as above. I am not getting this error for first time. But the interesting thing is, I solved the error in different way before. I think this problem can be occurs for many reasons. Since I face the problem and spent time to solve this issue, I think it is better to share ideas with others. It may be helpful for those who will get this error in future.

According to http://support.microsoft.com/kb/315158 the problem occurs because of Aspnet_wp.exe fails to start. By default, ASP.NET runs its worker process (Aspnet_wp.exe) with a weak account (the local machine account, which is named ASPNET) to provide a more secure environment. On a domain controller or on a backup domain controller, all user accounts are domain accounts and are not local machine accounts. Therefore, Aspnet_wp.exe fails to start because it cannot find a local account named "localmachinename\ASPNET". To provide a valid user account on the domain controller, you must specify an explicit account in the section of the Machine.config file, or you must use the SYSTEM account.

Solution 1:

1. Check that ‘IUSR_machine’ and ‘IWAM_machine’

Solution 2:

1. Stops the IIS and the ASP.NET state services.

2. Deletes and then re-creates the ASPNET account by using a known temporary password.

3. Reregisters ASP.NET. This step creates a new random password for the account and applies default ASP.NET access control settings for the account.

4. Restarts the Microsoft Internet Information Services (IIS) service.

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