IIS Request Timeout on long ASP NET operation

Question

I am experiencing a request timeout from IIS when I run a long operation  Behind the scene my ASP NET application is processing data  but the number of records being processed is large  and thus the operation is taking a long time    However  I think IIS times out the session  Is this a problem with IIS or ASP NET session   Thanks in advance

User · Answer

Remove   character in location  so  path    Admin SomePage aspx    becomes  path  Admin SomePage aspx

User · Answer

If you want to extend the amount of time permitted for an ASP NET script to execute then increase the Server ScriptTimeout value  The default is 90 seconds for  NET 1 x and 110 seconds for  NET 2 0 and later   For example      Increase script timeout for current page to five minutes Server ScriptTimeout   300    This value can also be configured in your web config file in the httpRuntime configuration element    lt  -- Increase script timeout to five minutes -- gt   lt httpRuntime executionTimeout  300         other configuration attributes       gt      Please note according to the MSDN documentation        This time-out applies only if the debug attribute in the compilation   element is False  Therefore  if the debug attribute is True  you do   not have to set this attribute to a large value in order to avoid   application shutdown while you are debugging     If you ve already done this but are finding that your session is expiring then increase the  ASP NET HttpSessionState Timeout value   For example      Increase session timeout to thirty minutes Session Timeout   30    This value can also be configured in your web config file in the sessionState configuration element    lt configuration gt     lt system web gt       lt sessionState        mode  InProc        cookieless  true        timeout  30    gt     lt  system web gt   lt  configuration gt    If your script is taking several minutes to execute and there are many concurrent users then consider changing the page to an Asynchronous Page  This will increase the scalability of your application   The other alternative  if you have administrator access to the server  is to consider this long running operation as a candidate for implementing as a scheduled task or a windows service

User · Answer

I m posting this here  because I ve spent like 3 and 4 hours on it  and I ve only found answers like those one above  that say do add the executionTime  but it doesn t solve the problem in the case that you re using ASP  NET Core  For it  this would work   At web config file  add the requestTimeout attribute at aspNetCore node    lt system webServer gt     lt aspNetCore requestTimeout  00 10 00       other configs goes here    gt   lt  system webServer gt    In this example  I m setting the value for 10 minutes   Reference  https   docs microsoft com en-us aspnet core hosting aspnet-core-module configuring-the-asp-net-core-module

User · Answer

Great and exhaustive answerby  Kev   Since I did long processing only in one admin page in a WebForms application I used the code option  But to allow a temporary quick fix on production I used the config version in a  lt location gt  tag in web config  This way my admin processing page got enough time  while pages for end users and such kept their old time out behaviour   Below I gave the config for you Googlers needing the same quick fix  You should ofcourse use other values than my  4 hour  example  but DO note that the session timeOut is in minutes  while the request executionTimeout is in seconds   And - since it s 2015 already - for a NON- quickfix you should use  Net 4 5 s async await now if at all possible  instead of the  NET 2 0 s ASYNC page that was state of the art when KEV answered in 2010       lt configuration gt                lt compilation debug  false      gt          other stuff          lt location path    Admin SomePage aspx  gt           lt system web gt               lt sessionState timeout  240    gt               lt httpRuntime executionTimeout  14400    gt           lt  system web gt       lt  location gt           lt  configuration gt

[asp.net] IIS Request Timeout on long ASP.NET operation

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