App Pool Hangs, Only Fixed By Restarting It.RSS

1 reply

Last post May 06, 2019 01:10 PM by lextm

  • App Pool Hangs, Only Fixed By Restarting It.

    May 06, 2019 09:42 AM|Rayce|LINK

    I am new to managing IIS.

    One of our web services is run by it's own Application Pool.

    It takes the requests, runs a SQL query, and returns some JSON.
    Roughly once to twice a month the service will seemingly freeze, and stop responding to requests.

    IIS reports the app pool as running, and no log that I know of reports an error.
    Restarting the app pool solves the problem, until it decides to hang again.

    I have tested requests to the service that I logged as occurring shortly before I believe the  app pool froze, but have been unable to duplicate the problem purposefully.

    Per some colleague's advice, as they have a similar problem, I have started a task that regularly restarts the app pool.

    Is there a way to tell exactly what request - if that is indeed the cause - is causing the app pool to hang?

    Are there any causes that might be easy to test for?

  • Re: App Pool Hangs, Only Fixed By Restarting It.

    May 06, 2019 01:10 PM|lextm|LINK

    Learn to use a performance profiler to see what's up, or open a support case to consult Microsoft support via I don't assume everyone knows how to collect hang dumps and analyze on their own.

    Lex Li
    Affordable IIS Consulting Services at
    This posting is provided "AS IS" with no warranties, and confers no rights.