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We found a problem, ASP.NET Core application on some servers randomly restarts every day at random times.
In Event Viewer In Application Section
Application 'MACHINE/WEBROOT/APPHOST/APPLICATIONNAME' started process 'xxx' successfully and is listening on port 'xxx'. (Event ID 1001)
Sent shutdown HTTP message to process '6860' and received http status '202'. (Event ID 1006)
App_offline file 'app_offline.htm' was detected (Event ID 1012)
And in System Section at same time
The TCP/IP NetBIOS Helper service entered the running state. (Event ID 7036)
The TCP/IP NetBIOS Helper service entered the stopped state. (Event ID 7036)
The TCP/IP NetBIOS Helper service was successfully sent a stop control. The reason specified was: 0x40030011 [Operating System: Network Connectivity (Planned)] Comment: None (Event ID 7042)
All events happen in 2-3 seconds
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The IIS restart command was needed for restarting the web server process to resolve performance issues that may have developed in the application.
What is application pool recycling in IIS? Recycling means that the worker process that handles requests for that application pool is terminated and a new one is started. This is generally done to avoid unstable states that can lead to application crashes, hangs, or memory leaks.
All replies. IISreset resets all application pools. Application pools are used to seperate processes. In earlier versions we always had to reset IIS, and so resetting ALL websites.
Configuring Auto-Start with IIS ManagerIn the Connections pane, select the Application Pools node, revealing the Application Pools pane in the main view. Select the application pool for which you wish to enable Auto-Start. Locate the Start Mode option under the General group and set it to AlwaysRunning. Click OK.
It sounds like you have periodicRestart configured on IIS. https://docs.microsoft.com/en-us/iis/configuration/system.applicationhost/applicationpools/add/recycling/periodicrestart/ I think the default interval is 29 hours. Disable this setting.
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