freuqent alerts saying app pool disabled

sns 9,226 Reputation points
2021-03-17T05:40:28.107+00:00

freuqent alerts saying app pool disabled.
upon checking event logs, I found information mentioned in the attached logs
Please help. why it happened? and what we have to do to avoid this alerts
we have 2 WFE and 2 APP. this alerts are on one of the web front end.
Please find attached event logs
78509-eventlogs.txt

SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Trevor Seward 11,681 Reputation points
    2021-03-17T18:31:52.077+00:00

    Looks like there is an issue on the IIS site preventing the config from being read. One of the easiest ways to identify what lines are an issue is to go to the IIS site in question and then view Authentication. If it throws an error, it typically tells you what line is a problem.

    Another thing to try is on the problematic server: 

    $wa = Get-SPWebApplication https://problemUrl
$wa.Unprovision()
$wa.Provision()

    This will remove and then re-provision the web application and associated IIS pool (unless that IIS pool is used by other Web Applications, then you'll want to stop/start the Foundation Web service which will de-provision/re-provision all Web Apps/IIS pools on that server).

  2. JoyZ 18,041 Reputation points
    2021-03-18T11:08:20.533+00:00

    Hi @sns ,

    Please go to C:\inetpub\temp\appPools to check if there was a corrupted shortcut with the name of your site.

    If true, delete the shortcut and restart the site to check whether a folder with the site name and a .config file is created in it.

    Similar issue for your reference:

    https://stackoverflow.com/questions/47518974/503-service-unavailable-trying-to-read-configuration-data-from-file

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

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  3. JoyZ 18,041 Reputation points
    2021-03-29T08:46:56.423+00:00

    Hi @sns ,

    From the alert message, which means your server is under a heavy load, the Server service may repeatedly log it in the System Event log. It indicates that the server is out of paged pool memory.

    To solve this issue, set the value at 60 informs the Memory Manager in following registry to start the trimming process at 60 percent of PagedPoolMax rather than the default setting of 80 percent.If a threshold of 60 percent isn't enough to handle spikes in activity, reduce this setting to 50 percent or 40 percent. 

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory Management

    Restart the server for the changes to take effect.

    Note:

    Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it.

    More information for your reference:

    https://learn.microsoft.com/en-us/troubleshoot/windows-server/performance/unable-allocate-memory-system-paged-pool