UE4.25) Only one of the shader copile workers is working and other workers won't be terminated

Development Programming & Scripting
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1

I have built Unreal Engine 4.25 from github source. But whenever I try to run the editor I’ve built, only one of the 9 shader compile workers is working, and every others are not terminated even if after all shaders compiled.

I can see it from the output window of visual studio:

...
[2023.02.16-05.44.43:957][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2972
[2023.02.16-05.44.44:518][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2971
[2023.02.16-05.44.44:518][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2970
[2023.02.16-05.44.44:518][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2969
[2023.02.16-05.44.44:518][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2968
[2023.02.16-05.44.45:079][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2967
[2023.02.16-05.44.45:079][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2966
[2023.02.16-05.44.45:079][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2965
[2023.02.16-05.44.45:640][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2964
[2023.02.16-05.44.45:640][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2963
[2023.02.16-05.44.45:640][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2962
[2023.02.16-05.44.45:640][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2961
[2023.02.16-05.44.46:201][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2960
[2023.02.16-05.44.46:201][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2959
[2023.02.16-05.44.46:201][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2958
...

Other workers just work only once when they are loaded

...
[2023.02.16-05.38.40:814][  0]LogShaderCompilers: Display: Worker (1/9): shaders left to compile 2715
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (2/9): shaders left to compile 2714
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (3/9): shaders left to compile 2713
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (4/9): shaders left to compile 2712
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (5/9): shaders left to compile 2711
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (6/9): shaders left to compile 2710
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (7/9): shaders left to compile 2709
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (8/9): shaders left to compile 2708
[2023.02.16-05.38.40:815][  0]LogShaderCompilers: Display: Worker (9/9): shaders left to compile 2707
...

Worse thing is, because they are not terminated after compilation phase(which I can confirm with TaskManager), editor startup process won’t proceed over 69%.

I’ve rebuilt ue4.25 several times already. And also waited them to terminated for a whole night.

What am I supposed to check now?

2

@Flavored_Candy
Since your building from source, it might be possible that there is a hotfix somewhere in the source repo that might help your problem. Another forum thread suggests that deleting the Config folder.
Shader compilation happens separate from the other processes within the Engine, and for this version of Unreal, at a much lower priority on the computer. I’ve found an older project that changes the priority of the shaders, if you think it’ll help:

Other than that, I’d recommend using the 4.27 version of UE4, it definitely had some of the most support and fixes for UE4.
Let me know if this works!
-Zen

3

Did you end up solving it? The post is still marked as unresolved.