Trace.Assert Performing As Expected When Run From The Cluster Manager

Tue, 16 Jun 2009 18:19:20 Z

Trace.Assert doesn't work as expected when running as a job in cluster manager - Here's a VB.NET code sample that illustrates the problem:

Sub Main(ByVal args() As String)

Console.WriteLine("Before assert")

Trace.Assert(False)

Console.WriteLine("After assert")

End Sub

When logged directly into one of the HPC nodes, if you run the application it prints the first line to the console and then puts up a dialog as expected. But if the application is run as a task in an HPC job, both lines are written to the console and the assert doesn't have any affect. Is this behavior expected?

Trace.Assert Performing As Expected When Run From The Cluster Manager

Wed, 22 Jul 2009 21:49:18 Z

I asked around a bit. No body here is quite sure what's going on :-) Our best guess is that in since jobs run in a non-interactive session, its attempt to put up a dialog fails, it swallows the exception, and then it moves onto the next line of code.

You could try using HPC_ATTACHTOCONSOLE to run your job in an interactive sessoin and see if it behaves differently:
http://blogs.msdn.com/philpenn/archive/2008/08/19/windows-hpc-server-2008-rc2-now-available.aspx

Thanks!
Josh

-Josh