Azure ASP.NET RC1 Deployment Failure

Question

I have an ASP.NET Core RC1 application that is deployed to Azure via GitHub deployment (i.e., I commit source to GitHub and the application is built/deployed by Azure).

Everything worked fine up until sometime within the last 5 days. I successfully deployed my application 5 days ago (~2016-05-16). Today I made a change and tried to deploy again but the deploy failed. I attempted to deploy again (thinking the problem may be transient) and encountered the same problem. I then tried re-deploying the previous known good commit, which failed again (note: project.lock is in source control). I then rolled master back to the previous known good and pushed which triggered another deploy, same error.

It could be just a coincidence, but RC2 with significant breaking changes was released since I previously attempted a deploy.

Looking at my deployment log, the first error is:

Failed to resolve conflicts for DNX,Version=v4.5.1

Unable to satisfy conflicting requests for 'Microsoft.Extensions.Configuration':
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.ApplicationInsights.AspNet 1.0.0-rc1-update4),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.AspNet.Hosting 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Json 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final),
Microsoft.Extensions.Configuration (>= 1.0.0-rc1-final) (via package/Microsoft.Extensions.Configuration.Binder 1.0.0-rc1-final)"

I get a whole slew of errors like that (Unable to satisfy conflicting requests for ...) for various transitive dependencies.

Since this project successfully deployed 5 days ago with a particular commit/project.lock, I have to assume something has changed in Azure or NuGet to cause this.

I deleted my local NuGet package cache and was able to successfully rebuild in Visual Studio and VSCode.

Any advice on troubleshooting steps is welcome.

Answer 1

This happened when RC2 was released, which caused an issue with the RC1 deployments. Please use the following workaround (from here):

• Copy .deployment and deploy.cmd from https://github.com/davidebbo-test/AspNet5RC1
• Edit this line in deploy.cmd to point to your project.json
• Also if your project is on something other than rc1-update1 (e.g. if it's on beta8), you'll need to fix up all the rc1 references in that file (there are two).
• Commit both files at the root of your repository.

That being said, you should be looking into moving to RC2 :)

Answer 2

One other thing to check is if you have any "open" library version requirements. For me, the issue at hand was with my 1.0.0-* dependencies. Since they were "open" on the version, they were attempting to grab rc2 dependencies which were incompatible. Once I changed these to a fixed RC1, things resolved themselves. I was unable to update to RC2 because some of my other libraries were incompatible.