[Blazor] Concurrent Build Issue -

[softwaretirol]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

We have a large solution with multiple WASM projects and upgraded everything to .net 10.
On our buildmachine we get concurrent access problems to some files.

If we append /m:1 everything is working like expecting.

Web.Office.AppointmentBooking.App.Wasm net10.0 browser-wasm failed with 1 erro r(s) (2.3s) /root/.dotnet/sdk/10.0.100/Sdks/Microsoft.NET.Sdk.StaticWebAssets/targets/Mi crosoft.NET.Sdk.StaticWebAssets.Compression.targets(233,5): error System.IO.IOException: The process cannot access the file '/Agent/_work/we bofficedigital/webofficedigital/src/Web/Public/AppointmentBooking/Web.Offi ce.AppointmentBooking.App.Wasm/obj/Release/net10.0/rbcswa.dswa.cache.json' because it is being used by another process. at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, Fil eMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixF ileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Fun c4 createOpenException)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMod
e mode, FileAccess access, FileShare share, FileOptions options, Int64 pre
allocationSize, Nullable`1 unixCreateMode)
at System.IO.File.OpenWrite(String path)
at Microsoft.AspNetCore.StaticWebAssets.Tasks.DefineStaticWebAssets.Def
ineStaticWebAssetsCache.WriteCacheManifest()
at Microsoft.AspNetCore.StaticWebAssets.Tasks.DefineStaticWebAssets.Exe
cute()

Expected Behavior

No response

Steps To Reproduce

No response

Exceptions (if any)

No response

.NET Version

No response

Anything else?

No response

[MihuBot]

I'm a bot. Here is a possible related and/or duplicate issue (I may be wrong):

• Build *sporadically* fails with Microsoft.NET.Sdk.StaticWebAssets.Compression.targets: error : IOException: The process cannot access the file (..) because it is being used by another process #62565

[javiercn]

@softwaretirol thanks for contacting us.

Do you have a binlog we can look at?

[softwaretirol]

Please see here

[javiercn]

@softwaretirol thanks for the additional details.

We will take a look and update the issue once we learn more.

[softwaretirol]

It is definitly something in combination with the target -t:PublishContainer

[javiercn]

@softwaretirol one thing you can try here is using -m:1 in the dotnet publish command and see if that helps.

What typically happens here is that there is a diamond dependency and as a result a shared project is being built in parallel by two or more consuming projects.

Based on the task that is failing, you can also try the setting the following <StaticWebAssetsCacheDefineStaticWebAssetsEnabled>false</StaticWebAssetsCacheDefineStaticWebAssetsEnabled> in your project. It should help.