Bug Building Assetbundles hangs indefinitely while building on a mac with the -batchmode option set

We're trying to setup a mac mini to use as a secondary buildstation. Our current jenkins setup works on windows, but after our adjustements for mac environment, we've had jobs being stuck on the bundle building process.
While trying to inspect where this behavior comes from, we tried to remove the -batchmode option, but with that unset the builds never hang anymore.

Unfortunately, while that fixes our builds, it's not a viable solution as we can always have some popup blocking execution. Is this a known issue?

 

Do you have any editor logs? do you know which part of the process hangs?

 

Yeah, all our build logs end like this :

Code (CSharp):

1.  
2. Script Compilation Pipeline Post Process Assets time: 0.000011s
3. Assembly Updater Post Process Assets time: 0.000013s
4.  
5. Hashing assets (1 files)... 0.000 seconds
6.   file read: 0.000 seconds (0.001 MB)
7.   wait for write: 0.000 seconds (I/O thread blocked by consumer, aka CPU bound)
8.   wait for read: 0.000 seconds (CPUT thread waiting for I/O thread, aka disk bound)
9.   hash: 0.000 seconds
10. Connect to CacheServer unity-cache.mds.com:8126
11. Script Compilation Pipeline Post Process Assets time: 0.000007s
12. Assembly Updater Post Process Assets time: 0.000017s
13. Unloading 907 Unused Serialized files (Serialized files now loaded: 0)
14. System memory in use before: 0.61 GB.
15. System memory in use after: 0.61 GB.
16.  
17. Unloading 1354 unused Assets to reduce memory usage. Loaded Objects now: 13123.
18. Total: 20.412698 ms (FindLiveObjects: 1.578099 ms CreateObjectMapping: 0.828326 ms MarkObjects: 17.017840 ms  DeleteObjects: 0.987366 ms)
19.  
20. Disconnect from CacheServer
21. Refreshing native plugins compatible for Editor in 20.14 ms, found 3 plugins.
22. Preloading 1 native plugins for Editor in 0.95 ms.
23. DisplayProgressbar: Switch To Build Platform
24. DisplayProgressbar: Rebuild Sprite Atlas Cache
25. - Collect Sprites to Pack : (SequentialAtlasing : 0)
26. [    153 MB ]- Grouping sprites using the selected SpritePackerPolicy.
27. [    337 MB ]-     Atlas "Credits" with 48 sprites assigned.
28. [    338 MB ]-     Atlas "FMLogos" with 9 sprites assigned.
29. [    338 MB ]-     Atlas "MobileHUD" with 26 sprites assigned.
30. [    338 MB ]-     Atlas "MobileLevel" with 10 sprites assigned.
31. [    338 MB ]-     Atlas "OptionsButtons" with 13 sprites assigned.
32. [    338 MB ]-     Atlas "PauseButtons" with 1 sprites assigned.
33. [    338 MB ]-     Atlas "PhotoMode" with 3 sprites assigned.
34. [    338 MB ]-     Atlas "RewiredControlMapper" with 6 sprites assigned.
35. [    338 MB ]-     Atlas "RewiredTouchControls" with 19 sprites assigned.
36. [    338 MB ]-     Atlas "SCLogos" with 5 sprites assigned.
37. [    338 MB ]-     Atlas "TTLogos" with 9 sprites assigned.
38. [    338 MB ]-     Atlas "UWLogos" with 5 sprites assigned.
39. [    338 MB ]- Completed grouping sprites to Atlas.
40. [    337 MB ]- Build Sprite Atlas.
41. [    338 MB ]- Packing 12 atlases.
42. [    338 MB ]- Atlas (Credits) file (9d4ef739a61812b025c5ef88a8f0ef1a) found. Mapping.
43. [    338 MB ]- Atlas (FMLogos) file (3b290c2ddc903581b6d9002ea451b0a9) found. Mapping.
44. [    338 MB ]- Atlas (MobileHUD) file (f33d20fe0d1eec2021a6fa8c30815a10) found. Mapping.
45. [    338 MB ]- Atlas (MobileLevel) file (1ce2b69f119a2a729361eb84673beb65) found. Mapping.
46. [    338 MB ]- Atlas (OptionsButtons) file (0e20c3669114f610264ea5f3415bf1b2) found. Mapping.
47. [    338 MB ]- Atlas (PauseButtons) file (961576b59ab91aa39a01a4105c14b823) found. Mapping.
48. [    338 MB ]- Atlas (PhotoMode) file (7b3a43539a31e9ed5b60be43811be271) found. Mapping.
49. [    338 MB ]- Atlas (RewiredControlMapper) file (5432541406f533b2540dd8e2c8d900a9) found. Mapping.
50. [    338 MB ]- Atlas (RewiredTouchControls) file (4999311b2d168d19c811666a5cea57cc) found. Mapping.
51. [    338 MB ]- Atlas (SCLogos) file (28ea1d1268b114efc64bba5ba5751300) found. Mapping.
52. [    338 MB ]- Atlas (TTLogos) file (fb12a045c559fc3df3b329d050b301a0) found. Mapping.
53. [    338 MB ]- Atlas (UWLogos) file (66bdefea8a90296756e4f0a91c33d044) found. Mapping.
54. [    338 MB ]- Packing completed.
55. [    337 MB ]- Update Sprites and Cleanup.
56. [    337 MB ]DisplayProgressbar: Build Player Scripts
57. - Starting compile Library/ScriptAssemblies/Unity.ResourceManager.dll
58. - Starting compile Library/ScriptAssemblies/Unity.Analytics.DataPrivacy.dll
59. - Starting compile Library/ScriptAssemblies/Unity.MemoryProfiler.dll
60. - Starting compile Library/ScriptAssemblies/Unity.ScriptableBuildPipeline.dll
61. - Starting compile Library/ScriptAssemblies/Unity.PackageManagerUI.Editor.dll
62. - Starting compile Library/ScriptAssemblies/UnityEditor.CacheServer.dll
63. - Starting compile Library/ScriptAssemblies/Unity.EditorCoroutines.Editor.dll
64.  

This is when the assetbundle are starting their actual building, as far as I know (last message we have is from Addressables working on creating the content catalog).

So it never finish to compile any dll, but it manages to do actual builds if we make it skip the bundle part.

 

@MagicDesignEmerick I glad to see someone else having this issue !
Is it random or a 100 repro case ?

@liortal from our side it seems to hang at a similar place than them. In the "Starting compile" part.

It seems quite similar to one of mine link in this post :
https://forum.unity.com/threads/com...mpiler-is-sometimes-stucked-during-ci.705095/

On our side it's totally random and not due to asset bundles sadly but it really looks like the same issue !
At least maybe if we are at least 2 some unity guys will check this and if you have a 100% repro case it could be super !

So I have some questions :
Which MacOS do you have ?
Which Unity version do you use ?

I don't think it's due to Unity version cause it's happening on all our 2018 testing version. But just in case I prefer to mention it again here.