CruiseControl.Net restarts after project with msbuild task - msbuild

Question

I'm trying to setup a fairly simple CruiseControl.NET build server and I'm seeing strange behavior with a project using MSBuild. Everytime the project's build is run and it executes msbuild (either through forcing or through a change in source control), the build completes successfully but CCNet also restarts. I notice this because the 'Next Build Time' of all the projects are moved ahead to the current time + initialSeconds.
This behavior appears whether I'm running CCNet as a serivce or through the command line executable.
When running on the command line, the debug output doesn't give me anything useful - it just immediately jumps from the last line of the project's build to the 'startup' output.
Additional information:
TFS is the source control server
My build is only hitting the working directory
My publish is just copying from the working directory to the artifact directory
If I comment out the msbuild task, running the project build does not restart CruiseControl
Not hitting or updating the Server or State directories of CruiseControl during build
Nothing useful in Event Viewer when this happens and I'm running as a service. CCService doesn't report stopping/starting - it's like cruise control is internally restarting.
And here is the msbuild configuration:
<tasks>
<msbuild>
<executable>C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe</executable>
<workingDirectory>$[$CCNetWorkingDirectory]\$(PathToSolution)</workingDirectory>
<projectFile>$(SolutionFile)</projectFile>
<buildArgs>/p:Configuration=Release /v:d</buildArgs>
<timeout>900</timeout>
</msbuild>
</tasks>
Finally, here is the trace log at the end of the msbuild process / restart of server.
Done building target "Build" in project "MYAPP.sln".
Done Building Project "C:\CCNet\WD\NET\Main\MYAPP\MYAPP.sln" (default targets).
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:05.35
2014-08-26 20:11:41,881 [NET.App.MYAPP] [INFO] - Delete merged file 'C:\CCNet\BuildArtifacts\NET.App.MYAPP\msbuild-results-dcf002da-d0d0-4d0a-8b86-fb25adaf1ac3.xml'.
2014-08-26 20:11:46,478 [NET.App.MYAPP] [INFO] - Integration complete: Success - 8/26/2014 8:11:41 PM
2014-08-26 20:11:46,579 [NET.App.MYAPP] [INFO] - Integrator for project: NET.App.MYAPP is now stopped.
2014-08-26 20:11:57,444 [257] [INFO] - CruiseControl.NET Server 1.8.5.0 -- .NET Continuous Integration Server
2014-08-26 20:11:57,465 [257] [INFO] - Copyright © 2003 - 2014 ThoughtWorks Inc. All Rights Reserved.
2014-08-26 20:11:57,466 [257] [INFO] - .NET Runtime Version: 2.0.50727.5477 Image Runtime Version: v2.0.50727
2014-08-26 20:11:57,467 [257] [INFO] - OS Version: Microsoft Windows NT 6.1.7601 Service Pack 1 Server locale: English (United States)
2014-08-26 20:11:57,467 [257] [INFO] - Reason: File change delay finished
2014-08-26 20:11:57,944 [CCNet Server] [INFO] - Reading configuration file "C:\CCNet\Server\ccnet.config"
2014-08-26 20:11:58,347 [CCNet Server] [WARN] - Configuration does not have any version information - assuming the configuration is for version 1.8
2014-08-26 20:11:58,800 [CCNet Server] [INFO] - Log cache time set to 5 minutes
2014-08-26 20:11:58,990 [CCNet Server] [INFO] - Registered channel: tcp
2014-08-26 20:11:58,991 [CCNet Server] [INFO] - CruiseManager: Listening on url: tcp://32.32.29.129:21234/CruiseManager.rem
2014-08-26 20:11:58,992 [CCNet Server] [INFO] - Registered channel: tcp
2014-08-26 20:11:58,993 [CCNet Server] [INFO] - CruiseServerClient: Listening on url: tcp://32.32.29.129:21234/CruiseServerClient.rem
2014-08-26 20:11:58,994 [CCNet Server] [INFO] - Starting CruiseControl.NET Server

Answer 1

It looks like ccnet is noticing a change to a .dll file within the application directory and restarting to assimilate the changes.
Ccnet is looking for changes to any .dll file so if your build outputs at least one to this directory it would cause a restart.