IIS 6.0 locking up - Inetserver

This is a discussion on IIS 6.0 locking up - Inetserver ; I have an IIS 6.0 on W2K3 server sitting in one of our DMZs. All of the patches should be up-to-date. Starting last Thursday, users complained of no response from the application. From the web it appeared as though the ...

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IIS 6.0 locking up

  1. Default IIS 6.0 locking up

    I have an IIS 6.0 on W2K3 server sitting in one of our DMZs. All of the
    patches should be up-to-date. Starting last Thursday, users complained of no
    response from the application. From the web it appeared as though the site
    was down. Looking from the Event Viewer and the Admin Consoles, everything
    was running normally without any errors. I ended up issuing an 'IISRESET'
    command to get the site back up. Less than an hour later, it occurred again.
    This time, I rebooted the server. On Friday, it happened in the
    morning-reboot. And then it happened again late afternoon and I used
    'IISRESET'. Nothing again until Saturday afternoon and I used 'IISRESET'.
    Nothing on Sunday and so far today nothing has occurred. It has me rather
    concerned as this is a new site for us replacing some older software. It is
    pretty important we keep access up 24x7 without unexplained downtimes. I am
    not familiar enough with IIS and cannot seem to find what is actually
    causing the web server to hang. Does anyone have a suggestion as to what it
    could be or where to even begin? Thanks!



  2. Default Re: IIS 6.0 locking up

    Hi,

    First of all, i would check these places:
    - Event log
    - IIS log file
    - httperr log file
    - Use WFetch to see what is actually returned by IIS (if anything)

    If nothing above gives any result, i would do this:

    - Does it work locally?
    If yes, then it is not likely to be a problem with IIS. Start by checking
    network issues.

    - Is it isolated to one specific website (application pool)?
    If yes, then it is likely to be a problem with a specific application.
    Debug that application.

    - If IIS truly "hangs" and nothing works, use Crash/Hang agent
    http://www.microsoft.com/downloads/d...displaylang=en

    or Debug Diagnostic Tool v1.1
    http://www.microsoft.com/downloads/d...displaylang=en



    --
    Regards,
    Kristofer Gafvert
    http://www.gafvert.info/iis/ - IIS Related Info


    Wendell Crain wrote:

    >I have an IIS 6.0 on W2K3 server sitting in one of our DMZs. All of the
    >patches should be up-to-date. Starting last Thursday, users complained of
    >no response from the application. From the web it appeared as though the
    >site was down. Looking from the Event Viewer and the Admin Consoles,
    >everything was running normally without any errors. I ended up issuing an
    >'IISRESET' command to get the site back up. Less than an hour later, it
    >occurred again. This time, I rebooted the server. On Friday, it happened
    >in the morning-reboot. And then it happened again late afternoon and I
    >used 'IISRESET'. Nothing again until Saturday afternoon and I used
    >'IISRESET'. Nothing on Sunday and so far today nothing has occurred. It
    >has me rather concerned as this is a new site for us replacing some older
    >software. It is pretty important we keep access up 24x7 without
    >unexplained downtimes. I am not familiar enough with IIS and cannot seem
    >to find what is actually causing the web server to hang. Does anyone have
    >a suggestion as to what it could be or where to even begin? Thanks!


  3. Default Re: IIS 6.0 locking up

    On Nov 19, 11:03 am, "Wendell Crain" <wcr...@medben.com> wrote:
    > I have an IIS 6.0 on W2K3 server sitting in one of our DMZs. All of the
    > patches should be up-to-date. Starting last Thursday, users complained of no
    > response from the application. From the web it appeared as though the site
    > was down. Looking from the Event Viewer and the Admin Consoles, everything
    > was running normally without any errors. I ended up issuing an 'IISRESET'
    > command to get the site back up. Less than an hour later, it occurred again.
    > This time, I rebooted the server. On Friday, it happened in the
    > morning-reboot. And then it happened again late afternoon and I used
    > 'IISRESET'. Nothing again until Saturday afternoon and I used 'IISRESET'.
    > Nothing on Sunday and so far today nothing has occurred. It has me rather
    > concerned as this is a new site for us replacing some older software. It is
    > pretty important we keep access up 24x7 without unexplained downtimes. I am
    > not familiar enough with IIS and cannot seem to find what is actually
    > causing the web server to hang. Does anyone have a suggestion as to what it
    > could be or where to even begin? Thanks!



    Start here:
    http://blogs.msdn.com/david.wang/arc...eshooting.aspx

    Depending on the outcome of that investigation, you may proceed to
    this:
    http://blogs.msdn.com/david.wang/arc...ool_Crash.aspx


    My suspicion is that this is not an IIS issue. I suspect your new
    website application has performance problems that periodically
    manifests itself, more recently now. For example, it may be using a
    database on the backend, and that database is having performance
    problems after being in use for some time -- which hangs up the
    requests on the front end and makes it LOOK like the webserver is not
    responding when in fact it is waiting on the backend.

    Anyhow, that's just a random guess -- the troubleshooting steps and
    stack backtraces you gather from instructions in the blog entry will
    give lots more information. I am just trying to dispel your
    predisposition that this hanging problem with the web server when
    historically, it tends to be a problem with the web application
    running on the web server.

    And why are you on the hotseat and not the developers of the new
    website? Their website is hanging; so get them to investigate and fix
    it! As soon as you ran IISRESET, it means that the developer should be
    responsible. On IIS6, you should not need to run IISRESET -- you
    should just recycle/restart the Application Pool of the website that
    is hanging. IISRESET is basically banned for IIS6 and exists only
    because people got used to it with IIS5.


    //David
    http://w3-4u.blogspot.com
    http://blogs.msdn.com/David.Wang
    //

  4. Default Re: IIS 6.0 locking up

    Kristofer,

    Great suggestions. Thanks! I will try this next time this occurs. It didn't
    happen at all yesterday.


    "Kristofer Gafvert" <kgafvert@NEWSilopia.com> wrote in message
    news:xn0fdw3jxvwmpjz01l@news.microsoft.com...
    > Hi,
    >
    > First of all, i would check these places:
    > - Event log
    > - IIS log file
    > - httperr log file
    > - Use WFetch to see what is actually returned by IIS (if anything)
    >
    > If nothing above gives any result, i would do this:
    >
    > - Does it work locally?
    > If yes, then it is not likely to be a problem with IIS. Start by checking
    > network issues.
    >
    > - Is it isolated to one specific website (application pool)?
    > If yes, then it is likely to be a problem with a specific application.
    > Debug that application.
    >
    > - If IIS truly "hangs" and nothing works, use Crash/Hang agent
    > http://www.microsoft.com/downloads/d...displaylang=en
    >
    > or Debug Diagnostic Tool v1.1
    > http://www.microsoft.com/downloads/d...displaylang=en
    >
    >
    >
    > --
    > Regards,
    > Kristofer Gafvert
    > http://www.gafvert.info/iis/ - IIS Related Info




  5. Default Re: IIS 6.0 locking up

    David,

    Thanks for the information. It will definitely come in useful in determining
    the cause. You may be correct that it is the application. Hopefully that can
    be resolved soon. I ran across the IISRESET command using google. I wasn't
    aware that it had issues for the web server. I will try resetting the pool
    next time. I am normally on the development side of things, not the
    administration side so I am learning as I go.


    "David Wang" <w3.4you@gmail.com> wrote in message
    news:69a1779b-5753-4e91-b570-17e14e2e6e97@s12g2000prg.googlegroups.com...
    > Start here:
    > http://blogs.msdn.com/david.wang/arc...eshooting.aspx
    >
    > Depending on the outcome of that investigation, you may proceed to
    > this:
    > http://blogs.msdn.com/david.wang/arc...ool_Crash.aspx
    >
    >
    > My suspicion is that this is not an IIS issue. I suspect your new
    > website application has performance problems that periodically
    > manifests itself, more recently now. For example, it may be using a
    > database on the backend, and that database is having performance
    > problems after being in use for some time -- which hangs up the
    > requests on the front end and makes it LOOK like the webserver is not
    > responding when in fact it is waiting on the backend.
    >
    > Anyhow, that's just a random guess -- the troubleshooting steps and
    > stack backtraces you gather from instructions in the blog entry will
    > give lots more information. I am just trying to dispel your
    > predisposition that this hanging problem with the web server when
    > historically, it tends to be a problem with the web application
    > running on the web server.
    >
    > And why are you on the hotseat and not the developers of the new
    > website? Their website is hanging; so get them to investigate and fix
    > it! As soon as you ran IISRESET, it means that the developer should be
    > responsible. On IIS6, you should not need to run IISRESET -- you
    > should just recycle/restart the Application Pool of the website that
    > is hanging. IISRESET is basically banned for IIS6 and exists only
    > because people got used to it with IIS5.
    >
    >
    > //David
    > http://w3-4u.blogspot.com
    > http://blogs.msdn.com/David.Wang
    > //




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