Question

Application works only in DEBUG mode

Asked by: NTConcepts

I have an a CMS application internally that has a publish feature which basically retrieves XML formatted data from DB and saves as individual files on the file system.  It has been working fine on my dev and prod boxes and all of a sudden it is not working intermittently on the prod server which is a Windows server 2003 with IIS v6.0. It works perfectly fine on my dev box. On prod box, it throws the error after saving about 2/3rds of the files and calls it quit.

Other than saving files from the DB returned data, it also copies files from one location to another on the web server. Have tried debug code on the server, jumping up Execution Timeout in web.config, also raising Idle Timeout in IIS and nothing seem to work.

I was able to reproduce this on my dev box by creating IIS site for this instead of running from VS. The only time it works with IIS is if I attach the worker process to debug.

Even when runin VS, it fails with Release mode. Only Debug mode works.

Any help is greatly appreciated.
Thanks.

Process information: 
    Process ID: 5952 
    Process name: w3wp.exe 
    Account name: NT AUTHORITY\NETWORK SERVICE 
 
Exception information: 
    Exception type: ThreadAbortException 
    Exception message: Thread was being aborted. 
 
    Is authenticated: True 
    Authentication Type: Forms 
    Thread account name: NT AUTHORITY\NETWORK SERVICE 
 
Thread information: 
    Thread ID: 9 
    Thread account name: NT AUTHORITY\NETWORK SERVICE 
    Is impersonating: False 
    Stack trace:    at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
   at System.Web.HttpApplication.ApplicationStepManager.ResumeSteps(Exception error)
   at System.Web.HttpApplication.System.Web.IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, Object extraData)
   at System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr)
                                  
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Asked On
2009-08-20 at 18:11:33ID24670083
Tags

IIS v6.0

Topics

.Net Application Servers

,

Microsoft IIS Web Server

,

Programming for ASP.NET

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: DanielWilsonPosted on 2009-08-24 at 10:48:20ID: 25170604

Is something not being initialized?  I've seen that in C++ .Net ... the debug / IDE environment initialized stuff to 0, empty strings, etc. whereas the live environment didn't do that.

VB.Net, unless I'm much mistaken does that initialization for you, but I believe C# leaves initialization to the programmer.

Alternatively ... and maybe this fits your error messages more ... is there something that will work as long as it's being hit by only a single thread, but if accessed simultaneously be multiple threads will throw an exception?

 

by: NTConceptsPosted on 2009-08-24 at 11:36:01ID: 25171057

Hi Daniel,
Thanks for your comment.
I have tried that too and no luck. It seems to be giving up after about 2min. It saves whatever number of files it can in that time. It still works once in few times on the prod server whichis what  puzzles me. I can't seem to figure it out what could have been changed to cause this kind of behavior which was working perfectly fine couple of weeks ago.

Thanks,
B

 

by: moghazaliPosted on 2009-08-24 at 14:56:16ID: 25173037

Can you please share any error screens produced on the web site during the process.

Further, although it may seem incorrect, have you confirmed appropriate rights to Network Service/ASP.NET user for all the folders where these files are being written.

One more thing, do these files are written to the folder/disk for each server-request (user/session)? If yes, make sure one request writing these files is not overwriting the other request's writing? For each session/user request, you have to create a unique set of files or figure out a way to have only a single set of files written for all the users in such case.

 

by: NTConceptsPosted on 2009-08-25 at 08:46:03ID: 25178809

Mohgazali,
I don't have any other erros logged other than the event log I posted with the question. The permissions are being set correctly and the files are saved half way through. The process fails about 2min after starting. Is there anything else I might be missing like any kind of overflow?
Thanks.

 

by: DanielWilsonPosted on 2009-08-25 at 17:32:07ID: 25183561

http://forums.iis.net/t/1121400.aspx
See the bottom post by LethargicGeek.  I think this is your problem ... with a solution.

 

by: NTConceptsPosted on 2009-08-26 at 12:54:22ID: 31618652

Thankyou very much. The solution described in the link worked perfectly to resolve my issue. However, I still don't understand why this started happening all of a sudden when it has been a long time since we upgraded the application to 2.0

Thanks again.
B

20120131-EE-VQP-002

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