Event ID 5059 — IIS Application Pool Availability

Updated: January 20, 2010

Applies To: Windows Server 2008

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Web sites and Web applications depend on the availability of Internet Information Services (IIS) application pools. IIS application pools in turn depend on the Windows Process Activation Service (WAS). If WAS is not running or errors occur during the startup or shutdown of an application pool, Web sites and Web applications may not be available.

Event Details

Product: Internet Information Services
ID: 5059
Source: Microsoft-Windows-WAS
Version: 7.0
Symbolic Name: WAS_EVENT_RAPID_FAIL_PROTECTION_REGARDLESS
Message: Application pool %1 has been disabled. Windows Process Activation Service (WAS) encountered a failure when it started a worker process to serve the application pool.

Resolve

Debug the application and restart the application pool

To recover an application pool that has been disabled, follow these steps:

  • Correct any problems in the application that was running in the worker process. The application may have to be debugged and retested.
  • Restart the application pool.

To perform this procedure, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To restart the application pool:

  1. Click Start, click Control Panel, and then click Administrative Tools.
  2. Right-click Internet Information Services (IIS) Manager and select Run as administrator.
  3. In the Connections pane, expand the computer node for the Web server and select the Application Pools folder underneath it.
  4. In Features View, select the application pool you want to restart.
  5. Right-click the application pool and select Start.

Verify

To perform this procedure, you must have membership in Administrators, or you must have been delegated the appropriate authority.

To verify that an application pool has started:

  1. Click Start, click Control Panel, and then click Administrative Tools.
  2. Right-click Internet Information Services (IIS) Manager and select Run as administrator.
  3. In the Connections pane, expand the server node and select Application Pools.
  4. In Features View, the Status column for the application pool will indicate Started if the application pool has started.

Related Management Information

IIS Application Pool Availability

Internet Information Services (IIS) 7.0

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Community Content

Leszek J
Problem of Identity of the application pool, when using custom identity.
<p>To resolve the problem:</p> <p>1) change identity to ApplicationPoolIdentity</p> <p>2) make sure your custom identity user is enabled</p> <p>3) change back to custom identity user, by providing user name and password</p>
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vdugar
Application pool has been disabled. Windows Process Activation Service (WAS) encountered a failure..
<p>I saw this error "Application pool MOOAppPool has been disabled. Windows Process Activation Service (WAS) encountered a failure when it started a worker process to serve the application pool." in the event viewer.<br />Thought i could be due to WCF samples that i was working on and so i uninstalled WAS from windows features - Did not help.<br /></p> <p>After a lot of different tries - i learnt that the root cause of the issue was that my AppPool was running on a specific identity (my domain user acct.). The password for my domain account had expired and i had changed it. On resetting the password, the issue was resolved. </p>

Atul_Mishra
IIS Application Pool Availability
Create a new application pool for the application
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