Re: Windows Service and WCF Service Problem

Thanks for adding the solution to the archive

John Warner


> -----Original Message-----
> From: Discussion of advanced .NET topics. [mailto:ADVANCED-
> [email protected]] On Behalf Of Mike Andrews
> Sent: Thursday, August 27, 2009 2:49 PM
> To: [email protected]
> Subject: Re: [ADVANCED-DOTNET] Windows Service and WCF Service
> Problem
> 
> After much searching I have finally figured out what I needed to do.
> Apparently I needed to put the CallbackBehaviorAttribute attribute on
the
> Callback class and set the UseSynchronizationContext property to false.
Now
> all events are raised correctly in the windows service code for the WCF
> client.
> 
> Thanks for the suggestions.
> 
> 
> On Wed, Aug 26, 2009 at 4:48 PM, Mike Andrews
> <[email protected]>wrote:
> 
> > After working on this all day I have no more idea about what's going
on
> > that I did before.
> > However, I have used the Windows Debugging Tools and adplus to create
a
> > dump of the service while it's currently "hanging."
> >
> > Here's a dump of the relevant WCF thread:
> >
> > ESP       EIP
> > 05a1ee1c 7c90e514 [HelperMethodFrame_1OBJ: 05a1ee1c]
> >
System.Threading.WaitHandle.WaitMultiple(System.Threading.WaitHandle[],
> > Int32, Boolean, Boolean)
> > 05a1eee8 0364b3ff
> > System.Threading.WaitHandle.WaitAny(System.Threading.WaitHandle[],
> Int32,
> > Boolean)
> > 05a1ef08 0647760d
> >
> System.ServiceModel.Channels.IOThreadTimer+TimerManager.OnWaitCallba
> ck(System.Object)
> > 05a1ef3c 06f66f19
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper+WorkItem.
> Invoke2()
> > 05a1ef7c 06473948
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper+WorkItem.
> OnSecurityContextCallback(System.Object)
> > 05a1ef84 0364fe65
> > System.Security.SecurityContext.Run(System.Security.SecurityContext,
> > System.Threading.ContextCallback, System.Object)
> > 05a1ef9c 0647390d
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper+WorkItem.
> Invoke()
> > 05a1efb0 06473890
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper.ProcessCa
> llbacks()
> > 05a1efe4 064736ea
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper.Completio
> nCallback(System.Object)
> > 05a1f010 0647365f
> >
> System.ServiceModel.Channels.IOThreadScheduler+CriticalHelper+Schedule
> dOverlapped.IOCallback(UInt32,
> > UInt32, System.Threading.NativeOverlapped*)
> > 05a1f01c 7924e6cd
> >
> System.ServiceModel.Diagnostics.Utility+IOCompletionThunk.UnhandledExce
> ptionFrame(UInt32,
> > UInt32, System.Threading.NativeOverlapped*)
> > 05a1f050 0364cdc4
> >
> System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt
> 32,
> > UInt32, System.Threading.NativeOverlapped*)
> > 05a1f1f0 79e71b4c [GCFrame: 05a1f1f0]
> > OS Thread Id: 0xd4c (13)
> >
> > I was hoping that someone here might recognize one or more of these
> methods
> > and could tell me what direction to go from here.
> >
> > Thanks,
> > Mike
> >
> >   On Wed, Aug 26, 2009 at 9:38 AM, John Warner <[email protected]>
> wrote:
> >
> >> Take a quick look at this:
> >>
> >> http://www.codeproject.com/KB/dotnet/threadmonitor.aspx
> >>
> >> In your situation it may make things worse but
> >>
> >> John Warner
> >>
> >>
> >> > -----Original Message-----
> >> > From: Discussion of advanced .NET topics. [mailto:ADVANCED-
> >> > [email protected]] On Behalf Of Mike Andrews
> >> > Sent: Wednesday, August 26, 2009 10:31 AM
> >> > To: [email protected]
> >> > Subject: Re: [ADVANCED-DOTNET] Windows Service and WCF Service
> >> > Problem
> >> >
> >>  > I doubt it since it's not doing any UI interactions.  All ongoing
> >> activity
> >> > is occurring with WCF and various threads.
> >> > Is there a way to tell if you have any threads that are locked
because a
> >> is
> >> > waiting on b is waiting on a?
> >> >
> >> > On Wed, Aug 26, 2009 at 8:43 AM, Ernst Kuschke <[email protected]>
> >> > wrote:
> >> >
> >> > > Hi,
> >> > > I'm not sure what exactly it does, but does your Windows Service
> >> perhaps
> >> > > need the "Allow service to interact with desktop" permission?
> >> > > --
> >> > > Ernst Kuschke
> >> > > MVP - C# (South Africa)
> >> > > http://dotnet.org.za/ernst
> >> > >
> >> > > On Wed, Aug 26, 2009 at 3:16 PM, Mike Andrews
> >> > > <[email protected]>wrote:
> >> > >
> >> > > > I'm implementing a windows service and it contains a WCF client
to
> >> talk
> >> > > to
> >> > > > a
> >> > > > WCF service.  The windows service provides drop-folder
functionality
> >> for
> >> > > > files so that the files are picked up and processed using WCF
> >> services.
> >> > >  I
> >> > > > uses a process scheduler to allocate multiple files to multiple
> >> > > processors
> >> > > > to handle these files.  It all works fine when I test outside
the
> >> > > confines
> >> > > > of the windows service.  However, once executed in the context
of a
> >> > > windows
> >> > > > service it fails when the WCF service issues a callback to it's
> >> client
> >> > > > (which in this case is the windows service) . Then it just
hangs.
> >> I'm
> >> > > able
> >> > > > to break into the code and see that is is the callback in the
WCF
> >> service
> >> > > > that is hanging.  No code has been executed in the client
(windows
> >> > > > service).  It could be a permissions issue, but I changed the
> >> account of
> >> > > > the
> >> > > > windows service from LocalSystem to my user account for testing
to
> >> see if
> >> > > > that made a difference and it did not.  I'm administrator of
the
> >> machine
> >> > > > I'm
> >> > > > executing both the WCF service and the windows service.
> >> > > >
> >> > > > I'm at a loss here to figure out what's going on with this.
This is
> >> > > tried
> >> > > > and tested code (both the WCF client and WCF service) that has
> >> worked
> >> > for
> >> > > > months now and works outside the context of a windows service.
> The
> >> > code
> >> > > > and
> >> > > > examples I'm seeing online are utilizing a windows service as a
WCF
> >> > > service
> >> > > > but this is not my case.  Is there something I'm missing here
to
> >> allow it
> >> > > > to
> >> > > > work?  Some setting I need that I cannot seem to find?
> >> > > >
> >> > > > Any help would be most appreciated.
> >> > > >
> >> > > > Thanks,
> >> > > > Mike
> >> > > >
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