Why am I getting Thread was being aborted in ASP NET

Question

I am not sure why this happens and I never explicitly abort threads  so it s a bit of a surprise  But I log Exceptions and I am seeing      System Threading ThreadAbortException - Thread was being aborted    It appears to happen in a call to System Threading WaitHandle WaitOne  I am not sure how far this Exception goes  I don t think my threads ever terminate  because I catch log and swallow the error   Why am I getting these errors  Perhaps it s when I am forcefully terminating my server or asking it to reboot  If it isn t then what might be causing them

User · Answer

I got this error when I did a Response Redirect after a successful login of the user    I fixed it by doing a FormsAuthentication RedirectFromLoginPage instead

User · Answer

If you spawn threads in Application Start  they will still be executing in the application pool s AppDomain   If an application is idle for some time  meaning that no requests are coming in   or certain other conditions are met  ASP NET will recycle the entire AppDomain    When that happens  any threads that you started from that AppDomain  including those from Application Start  will be aborted   Lots more on application pools and recycling in this question  What exactly is Appdomain recycling  If you are trying to run a long-running process within IIS ASP NET  the short answer is usually  Don t    That s what Windows Services are for

User · Answer

This problem occurs in the Response Redirect and Server Transfer methods  because both methods call Response End internally   The solution for this problem is as follows   For Server Transfer  use the Server Execute method instead   Visit this link for download an example

User · Answer

Nope  ThreadAbortException is thrown by a simple Response Redirect

User · Answer

ASP NET spawns and kills worker processes all the time as needed   Your thread may just be getting shut down by ASP NET    Old Answer   Known issue  PRB  ThreadAbortException Occurs If You Use Response End  Response Redirect  or Server Transfer  Response Redirect   bla aspx   false     or  try       Response Redirect  bla aspx      catch  ThreadAbortException ex

User · Answer

This error can be caused by trying to end a response more than once  As other answers already mentioned  there are various methods that will end a response  like Response End  or Response Redirect   If you call more than one in a row  you ll get this error   I came across this error when I tried to use Response End after using Response TransmitFile which seems to end the response too

User · Answer

For a web service hosted in ASP NET  the configuration property is executionTimeout    lt configuration gt   lt system web gt    lt httpRuntime executionTimeout  360    gt    lt  system web gt    lt  configuration gt    Set this and the thread abort exception will go away

[asp.net] Why am I getting "Thread was being aborted" in ASP.NET?

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