Ghost processes after initial build

[nojaf]

Apologies for not reporting this sooner but I fear I still found a problem after #14677.

Repro steps

• Fresh clone of the repository.
• dotnet build Fsharp.Compiler.Service.sln
• PowerShell: Get-Process -Name "dotnet" | Select-Object Id,Name,StartTime,CommandLine

Expected behavior

There shouldn't be any lingering dotnet processes after that initial build.
When doing a rebuild or -c Release fslex could be stuck because of a lock.

Actual behavior

Known workarounds

Kill all the processes: Get-Process -Name "dotnet" | Kill

[baronfel]

These mostly look to be MSBuild worker nodes - these stay around on purpose, but they shouldn't be locking any assemblies since those assemblies should be unloaded after a build. If this is causing actual problems you should be able to force them all to shut down with dotnet build-server shutdown.

[nojaf]

Interesting, I am seeing this:

C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018: The "GenerateRuntimeConfigurationFiles" task failed unexpectedly. [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018: System.IO.IOException: The process cannot access the file 'C:\Users\nojaf\Projects\fsharp\artifacts\bin\fslex\Debug\net7.0\fslex.runtim
econfig.json' because it is being used by another process. [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOpt
ions options) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions o
ptions, Int64 preallocationSize, Nullable`1 unixCreateMode) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions optio
ns, Int64 preallocationSize, Nullable`1 unixCreateMode) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String path, FileMode mode, FileAccess access, FileShare share, FileOpt
ions options, Int64 preallocationSize, Nullable`1 unixCreateMode) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at System.IO.File.Create(String path) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.NET.Build.Tasks.GenerateRuntimeConfigurationFiles.WriteToJsonFile(String fileName, Object value) [C:\Users\nojaf\Projec
ts\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.NET.Build.Tasks.GenerateRuntimeConfigurationFiles.WriteRuntimeConfig(RuntimeFramework[] runtimeFrameworks, LockFileTarg
etLibrary platformLibrary, Boolean isFrameworkDependent, IList`1 packageFolders) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.NET.Build.Tasks.GenerateRuntimeConfigurationFiles.ExecuteCore() [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.
fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.NET.Build.Tasks.TaskBase.Execute() [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\Users\nojaf\Projects\fsharp\bu
ildtools\fslex\fslex.fsproj]
C:\Program Files\dotnet\sdk\7.0.202\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.targets(292,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingC
ontext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [C:\Users\nojaf\Projects\fsharp\buildtools\fslex\fslex.fsproj]

Building the solution again does resolve the problem.

[vzarytovskii]

So, at this point, we don't do anything extra, just a normal dotnet build, no special tasks or anything, so it's likely unrelated to F#.