event 5011 daily on production IIS 8 server 2012RSS

2 replies

Last post Jan 20, 2021 03:22 AM by Brucz

  • event 5011 daily on production IIS 8 server 2012

    Jan 19, 2021 02:52 PM|cajo@tv2bornholm.dk|LINK

    We have an .NET intranet site running on IIS 8.

    We have setup the app pool to recycle every night at 4 am, however the app pool also recycles itself "randomly" almost once a day (in business hours, which is a major pain).

    We have installed DebugDiag (1.2) and have tried diagnosing the problem, however not being very well versed in this we turn to this forum.

    The summary from DebugDiag is shown below - however we cannot seem to extract anything meaningful from this as to what to do or where to look for the problem

     
     Analysis Summary  
      Type Description Recommendation 
      Warning The following threads in W301CB~1.DMP are waiting in a WaitOne

    ( 14 )

    3.57% of threads blocked


     Typically threads waiting in WaitMultiple are monitoring threads in a process and this may be ignored, however too many threads waiting in WaitOne\WaitMultiple may be a problem. Review the callstack of the threads waiting to see what they are waiting on 
      Information 
    The process w3wp.exe in W301CB~1.DMP is a 64 bit application. Some of the native (non-.NET) analysis, such as COM call information, may be missing. Further manual inspection of the dump may be required to extract such information.

     
     
     

  • Re: event 5011 daily on production IIS 8 server 2012

    Jan 19, 2021 07:11 PM|lextm|LINK

    cajo@tv2bornholm.dk

    Further manual inspection of the dump may be required to extract such information.

    Open a support case via http://support.microsoft.com so that Microsoft support team can help analyze the dumps and guide you further.

    Lex Li
    Affordable IIS Consulting Services at https://support.lextudio.com/services/consulting.html
    ---------------------------
    This posting is provided "AS IS" with no warranties, and confers no rights.
  • Re: event 5011 daily on production IIS 8 server 2012

    Jan 20, 2021 03:22 AM|Brucz|LINK

    Hi cajo@tv2bornholm.dk,

    It can be seen from debugdiag that the problem seems to be caused by thread blocking. The waiting thread cannot obtain the ready-made state in the process, which leads to a large number of thread blocking, and the application has to recycle and release the thread.

    cajo@tv2bornholm.dk

    Further manual inspection of the dump may be required to extract such information.

    You need to collect more dump file from debugdiag so that it will know what caused thread block.

    Best regards,

    Brucz

    .NET forums are moving to a new home on Microsoft Q&A, we encourage you to go to Microsoft Q&A for .NET for posting new questions and get involved today.