Plesk site on shared applicationPool shows error 500: The FastCGI process exited

[mahesh]

Question:
Plesk site on shared applicationPool shows error 500: The FastCGI process exited unexpectedly
Symptoms

• The website example.com is unavailable with the error message:

Code Select Expand

HTTP Error 500.0 - Internal Server Error
C:\Program Files (x86)\Plesk\Additional\PleskPHP70\php-cgi.exe - The FastCGI process exited unexpectedly

• More than one site is using shared application pool "plesk(default)(4.0)(pool)" at Windows > Server Manager > Tools > IIS Manager > hostname > Application Pools > plesk(default)(4.0)(pool) > View Applications.

Cause
Domains with different ASP.NET versions use shared application pool.

Resolution
1.Log into Plesk.
2.Enable dedicated application pool for both websites in Domains > example.com > Dedicated IIS Application Pool for Website > Switch On.
3.Disable it again in Domains > example.com > Dedicated IIS Application Pool for Website > Switch Off.