NuGet Push Failure in TFS build - tfs

Question

Preface: I am running NuGet Server (2.11.3) on Windows 2012 R2 / IIS 8.5. The NuGet Server manages its packages folder in separated file server (shared folder).
Additionally I am running TFS build machine (agent from TFS 2015) that uses this nuget server for both restore and push activities. Naturally, each build, initially, reads the target solution >>> projects >>> packages.config files and restores the configured packages from the nuget server. On late step, the agent generates the required *.nupkg files and pushes them to the nuget endpoint of the same nuget server. Those are dependencies of other solutions.
Problem: the majority of the solutions running properly without any special issues. There are couple of solutions that only 1-3 projects within them, fail the TFS build with the following message:
Response status code does not indicate success: 500 (Internal Server Error).
Unexpected exit code 1 returned from tool NuGet.exe
The IIS logs on nuget server looks like the following:
2017-03-27 16:47:26 192.168.2.116 PUT /MainRepository/nuget/ - 80 - 192.168.1.30 NuGet+Command+Line/3.5.0+(Microsoft+Windows+NT+6.2.9200.0) - 500 0 0 15
2017-03-27 16:47:26 192.168.2.116 PUT /MainRepository/nuget/ - 80 - 192.168.1.30 NuGet+Command+Line/3.5.0+(Microsoft+Windows+NT+6.2.9200.0) - 500 0 0 15
2017-03-27 16:47:26 192.168.2.116 PUT /MainRepository/nuget/ - 80 - 192.168.1.30 NuGet+Command+Line/3.5.0+(Microsoft+Windows+NT+6.2.9200.0) - 500 0 0 31
The following event is logged (shown in the event viewer) in the nuget server:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 27/03/2017 10:40:17
Event time (UTC): 27/03/2017 07:40:17
Event ID: cb897ce6dc2f4e40a07c71a9160718f2
Event sequence: 2073
Event occurrence: 4
Event detail code: 0
Application information:
Application domain: /LM/W3SVC/1/ROOT/MainRepository-1-131350724531418170
Trust level: Full
Application Virtual Path: /MainRepository
Application Path: C:\inetpub\wwwroot\NugetServerInternal\
Machine name: NUGET-SRV
Process information:
Process ID: 2512
Process name: w3wp.exe
Account name: some.domain/some.user
Exception information:
Exception type: IndexOutOfRangeException
Exception message: Index was outside the bounds of the array.
at System.Web.HttpRawUploadedContent.get_Item(Int32 index)
at System.Web.HttpMultipartContentTemplateParser.GetNextLine()
at System.Web.HttpMultipartContentTemplateParser.ParseIntoElementList()
at System.Web.HttpMultipartContentTemplateParser.Parse(HttpRawUploadedContent data, Int32 length, Byte[] boundary, Encoding encoding)
at System.Web.HttpRequest.GetMultipartContent()
at System.Web.HttpRequest.FillInFilesCollection()
at System.Web.HttpRequest.EnsureFiles()
at System.Web.HttpRequest.get_Files()
at System.Web.HttpRequestWrapper.get_Files()
at NuGet.Server.Publishing.PackageService.CreatePackage(HttpContextBase context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Request information:
Request URL: http://nuget-srv/MainRepository/nuget/
Request path: /MainRepository/nuget/
User host address: 192.168.1.30
User:
Is authenticated: False
Authentication Type:
Thread account name: some.domain/some.user
Thread information:
Thread ID: 19
Thread account name: some.domain/some.user
Is impersonating: False
Stack trace: at System.Web.HttpRawUploadedContent.get_Item(Int32 index)
at System.Web.HttpMultipartContentTemplateParser.GetNextLine()
at System.Web.HttpMultipartContentTemplateParser.ParseIntoElementList()
at System.Web.HttpMultipartContentTemplateParser.Parse(HttpRawUploadedContent data, Int32 length, Byte[] boundary, Encoding encoding)
at System.Web.HttpRequest.GetMultipartContent()
at System.Web.HttpRequest.FillInFilesCollection()
at System.Web.HttpRequest.EnsureFiles()
at System.Web.HttpRequest.get_Files()
at System.Web.HttpRequestWrapper.get_Files()
at NuGet.Server.Publishing.PackageService.CreatePackage(HttpContextBase context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
NOTE: per my checking sometime the package is created in the packages folder and sometime is not.
NOTE: I am pretty sure that all configuration is in place (including API key etc..). Of course, will be glad to know what is missing though.
Will appreciate any advice on this one.
Many thanks in advance,
Ofer

Answer 1

Poor answer though, but still one that might help any potential issues you guys encounter :-).
I've realized that my "problematic" push requests had worked against newly created NuGet server. The new one was Windows Server 2012 R2 too. I've just raised it clean and added ONLY the necessary windows features to support the IIS/web operations against the Nuget server.
If I am not mistaken it was only ASP.NET 4.5.
Best regards,
Ofer