Application_BeginRequest Not Being Fired In Stressed Environment?
Dec 14, 2010
We are obesrving strange problems when performing sress test of our applciation. We use Application_BeginRequest and Application_EndRequest to log the beginning and end of the web request, together, with the thread id.
However, from our logs, we see that Application_Begin_REquest is not being fired:
We use the following code to do the logging in global.asax.cs:
protected void Application_BeginRequest(object sender, EventArgs e)
{
string url = ""; [code]....
This is our log file. Urls are omitted The 00013 column is thread id.
14.12.10 21:41:25.042 00013 00000 Request: 172.23.26.41
14.12.10 21:41:25.068 00013 00000 End request: 172.23.26.41
14.12.10 21:41:25.212 00013 00000 Request: 172.23.26.41
14.12.10 21:41:25.223 00013 00000 End request: 172.23.26.41
14.12.10 21:41:30.974 00013 00000 End request: 172.23.26.88
You can see that there are two "End request" in the last two lines, but there is no (Begin) Request for the last log line.Our Dbg.WriteLine uses System.Diagnostics trace listeners to ouput data to the file.
Environment: Windows Server 2008 R2, ASP.NET 3.5
This only happens when performin stress test. CPU utilization is around 60%, there are max 10 concurent requests executing.
UPDATE: I have found out that some other also did have similar problems (althoug in different configuration:
http://forums.iis.net/t/1154954.aspx)
Matej
UPDATE#2: This night be related to fact, that Thread.GetHashCode() which is used to print out the thread identifier in our log fies could change. See ASP.NET - Thread.GetHashCode() changes
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