Hi,
This is a common error which we come across with the Windows VPS with Plesk. While restarting a website under IIS, the dependant Plesk pool fails to start under the application pool.
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Error in Event viewer: Application pool domain.tld(domain)(4.0)(pool) has been disabled. Windows Process Activation Service (WAS) encountered a failure when it started a worker process to serve the application pool.
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Resolution
To resolve the issue, perform the following steps:
1. Check which application pool serves the domain:
Go to IIS > Sites > domain.tld > Basic settings
2. Check the Identity that runs that application pool:
IIS > Application Pools > <name of the application pool> > Advanced settings > Process model: Identity
3. Reset the password for the account that runs the needed application pool:
Open the server management console > Configuration > Local Users and groups > Right-click <username> > Set password
4. Synchronize new settings for the Identity of the application pool:
IIS > Application Pools > <name of the application pool> > Advanced settings > Process model: Identity > "Browse" button (...) > "Set" button > Enter Identity account and newly set password
5. Recycle the application pool.
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There by fixing the concern.
Thank you for your time.
