Error when install dotnet/core/aspnet:3.1 on CentOS 8 - Folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

[ZhivovOleg]

Like as dotnet/dotnet-docker#1537
but I have same error on CenOS 8 (not Docker) on standalone machine.
Clean new CentOS 8 with latest updates on 23 dec 2020.
in console:

sudo dnf install aspnetcore-runtime-3.1 - OK

dotnet - OK (shows using manual)

dotnet --info - error:
A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

dotnet --list-runtimes - error:
A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

dotnet *.dll - error:
A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

the folder /usr/share/dotnet/host/fxr is really empty. Trying to install SDK - no effect

[mdjorov]

Same result for me as well. With aspnetcore-runtime-5.0.x86_64 installed.

[dagood]

Can you list the complete steps you took and the output?

It's unusual that dotnet --info is looking in /usr/share/dotnet/host/fxr. The version of .NET Core 3.1 available by default in CentOS 8 installs into /usr/lib64/dotnet/, not /usr/share/dotnet/. The only way I know of for this to happen is if your machine has some CentOS 8 distro (AppStream) packages installed but also some packages from https://packages.microsoft.com, which aren't compatible. (I opened dotnet/docs#18347 a while ago--I think this needs to be documented much better, with diag steps.)

When I install in a fresh CentOS 8 Docker container, it works fine for me: (using Docker just because it's an easy way to get a clean machine)

$ docker run -it --rm centos:8 bash -c '
    dnf install -y aspnetcore-runtime-3.1;
    dotnet --list-runtimes'
...
Dependencies resolved.
=======================================================================================================
 Package                     Arch        Version                                  Repository      Size
=======================================================================================================
Installing:
 aspnetcore-runtime-3.1      x86_64      3.1.10-1.el8_3                           AppStream      6.2 M
Installing dependencies:
 dotnet-host                 x86_64      5.0.0-0.8.0201202git337413b.el8_3        AppStream      108 k
 dotnet-hostfxr-3.1          x86_64      3.1.10-1.el8_3                           AppStream      165 k
 dotnet-runtime-3.1          x86_64      3.1.10-1.el8_3                           AppStream       27 M
 libicu                      x86_64      60.3-2.el8_1                             BaseOS         8.8 M
 lttng-ust                   x86_64      2.8.1-11.el8                             AppStream      259 k
 userspace-rcu               x86_64      0.10.1-2.el8                             BaseOS         101 k
...
Microsoft.AspNetCore.App 3.1.10 [/usr/lib64/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.10 [/usr/lib64/dotnet/shared/Microsoft.NETCore.App]

[marcpopMSFT]

Old issue triage: known issue when mixing source built and Microsoft built Linux. We've improved things in 9 a bit for that.