For an issue I worked on, the application pool kept stopping with Event ID 2269, 5139, and 5002. The errors and warnings I saw in Event Viewer are below.
Event 2269
The worker process for app pool 'DefaultAppPool' failed to initialize the http.sys communication when asked to start processing http requests
Event 5139
A listener channel for protocol 'http' in worker process serving application pool 'DefaultAppPool' reported a listener channel failure.
Event 5002
Application pool 'DefaultAppPool' is being automatically disabled due to a series of failures
Check if the application pool identity has “Bypass traverse checking” permission. This is group-policy permission to determine which users can traverse folders even if they don’t have permission on folders.
To give “Bypass traverse checking” permission:
If this doesn’t work, use “netstat” and see if there are port conflicts. There might be network and file structure related issues as well
Note: With the steps above, we added more users than we should. This is for testing only. You can later harden this configuration.
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