Worker Thread not running and is returning a status of stopped!!!

  • Thread starter Thread starter Jim Macbeth
  • Start date Start date
J

Jim Macbeth

Hi,
We have some code that converts uploaded files from the uploaded type
(word doc etc) to Text and HTML.

The code is as follows:

// Create new thread with STA ApartmentState to invoke the COM objects
Thread cft = new Thread(new ThreadStart(convertFileThread));
cft.ApartmentState = ApartmentState.STA;
cft.Name = "ConvertTo" + destinationType;

convertState = ConvertState.Started;
sThreadMessage = "Could not start conversion thread";
cft.Start(); // Do it

cft.Join(300000); // Wait a maximum of convertTimeout milliseconds
(300000 miliseconds = 5 mins)

if (convertState == ConvertState.Completed)
{
return null;
}
else if (convertState == ConvertState.Running)
{
return string.Format("File conversion could not complete in {0}
seconds", (convertTimeout/1000));
}
else
{
sThreadMessage += "(convert state: "+convertState.ToString()+", thread
state: "+cft.ThreadState.ToString()+")";
return sThreadMessage;
}

This works fine on all servers we have installed the code on except one.

On that server the convertFileThread delegate function never starts. The
code runs through to the last else clause and returns
the following error:

Could not start conversion thread (convert state: Started, thread state:
Stopped)

Is there anything in asp.net that prevents client threads from starting?

Please note that this isn't my code. I have inherited it.

Anyway I am well confused so any help would be most appreciated.

The server having the problem and others that this code works fine on are
running .NET v1.0.3705

Thanks in advance,

Jim
 
Jim said:
Hi,
We have some code that converts uploaded files from the uploaded type
(word doc etc) to Text and HTML.
Click to expand...
On that server the convertFileThread delegate function never starts. The
code runs through to the last else clause and returns
the following error:

Could not start conversion thread (convert state: Started, thread state:
Stopped)
Click to expand...

Are you absolutley shure that thread does not start?
I do not see a code that generate this message.
Possibly there happend some not handled exception in the new thread and it
never finish. Than, logic based on some global variable "convertState"
makes bogus assumption "Could not start conversion thread".

Debugger should help you :)
 
I wish the debugger would but locally it works fine so I can't reproduce the
problem.

Jim
 
Have you checked the event log for error messages?

This is unlikely but....perhaps the server does not have sufficient rights
to start a thread.

If you could post a snippet of the code the thread is supposed to execute it
might shed more light on this. Another thing you can try is to run DbgView
on the server machine to see if any debug messages are being generated.
 
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