Trouble using Distributed in Juno with non-default environment

General Usage
,
1

I’m struggling to use Distributed inside Juno without running into what seem to be pre-compilation race conditions. I can’t get @everywhere using to work (for some packages) outside the default environment, though it works fine in the REPL.
Any tips on how to successfully use Distributed in Juno?

Here is a simple consistently reproducing example:
I created a new environment, and added Images into it as the only dependency. Now, inside Juno:

using Pkg
Pkg.activate("tmpenv")
using Images # to precompile

using Distributed
addprocs(2)

@everywhere $Pkg.activate("tmpenv")

@everywhere (using Pkg; println(Pkg.API.Context().env.project_file)) # shows the correct Project.toml path
@everywhere using Images

The last line errors with

     From worker 2:    ERROR: LoadError: IOError: unlink: resource busy or locked (EBUSY)
      From worker 2:    Stacktrace:
      From worker 2:     [1] uv_error at .\libuv.jl:97 [inlined]
      From worker 2:     [2] unlink(::String) at .\file.jl:888
      From worker 2:     [3] rm(::String; force::Bool, recursive::Bool) at .\file.jl:268
      From worker 2:     [4] checkfor_mv_cp_cptree(::String, ::String, ::String; force::Bool) at .\file.jl:306
      From worker 2:     [5] cp(::String, ::String; force::Bool, follow_symlinks::Bool) at .\file.jl:345
      From worker 2:     [6] rename(::String, ::String; force::Bool) at .\file.jl:897
      From worker 2:     [7] compilecache(::Base.PkgId, ::String) at .\loading.jl:1296
      From worker 2:     [8] _require(::Base.PkgId) at .\loading.jl:1030
      From worker 2:     [9] require(::Base.PkgId) at .\loading.jl:928
      From worker 2:     [10] require(::Module, ::Symbol) at .\loading.jl:923
      From worker 2:     [11] include(::Function, ::Module, ::String) at .\Base.jl:380
      From worker 2:     [12] include(::Module, ::String) at .\Base.jl:368
      From worker 2:     [13] top-level scope at none:2
      From worker 2:     [14] eval at .\boot.jl:331 [inlined]
      From worker 2:     [15] eval(::Expr) at .\client.jl:467
      From worker 2:     [16] top-level scope at .\none:3
      From worker 2:    in expression starting at C:\Users\sternlab\.julia\packages\Images\Khbnr\src\Images.jl:30

I’ve seen this with various other packages too (in the more complex environment I was actually trying to use). versioninfo:

julia> versioninfo()
Julia Version 1.5.2
Commit 539f3ce943 (2020-09-23 23:17 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-9800X CPU @ 3.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-9.0.1 (ORCJIT, skylake-avx512)
Environment:
  JULIA_EDITOR = "C:\Users\sternlab\AppData\Local\atom\app-1.50.0\atom.exe"  -a
  JULIA_NUM_THREADS = 8
2

did you find out what caused this?
I frequently run in to ‘libuv’ issues like this

From worker 4:    ERROR: LoadError: SystemError: opening file "C:\\Users\\b\\.julia\\compiled\\v1.5\\LazyArrays\\h0pkJ_U4KrK.ji": No such file or directory
      From worker 3:    ERROR: LoadError: IOError: unlink: no such file or directory (ENOENT)
      From worker 4:    Stacktrace:
      From worker 3:    Stacktrace:
      From worker 3:     [1] uv_error at .\libuv.jl:97 [inlined]
      From worker 4:     [1] systemerror(::String, ::Int32; extrainfo::Nothing) at .\error.jl:168
      From worker 4:     [2] #systemerror#48 at .\error.jl:167 [inlined]
      From worker 4:     [3] systemerror at .\error.jl:167 [inlined]
      From worker 4:     [4] open(::String; lock::Bool, read::Bool, write::Nothing, create::Nothing, truncate::Nothing, append::Nothing) at .\iostream.jl:284
      From worker 4:     [5] open(::String, ::String; lock::Bool) at .\iostream.jl:346
      From worker 4:     [6] open at .\iostream.jl:346 [inlined]
      From worker 3:     [2] unlink(::String) at .\file.jl:918
      From worker 4:     [7] _require_from_serialized(::String) at .\loading.jl:732
      From worker 4:     [8] _require(::Base.PkgId) at .\loading.jl:1040
      From worker 4:     [9] require(::Base.PkgId) at .\loading.jl:928
      From worker 4:     [10] require(::Module, ::Symbol) at .\loading.jl:923
      From worker 4:     [11] include(::Function, ::Module, ::String) at .\Base.jl:380
      From worker 4:     [12] include(::Module, ::String) at .\Base.jl:368
      From worker 4:     [13] top-level scope at none:2
      From worker 4:     [14] eval at .\boot.jl:347 [inlined]
      From worker 4:     [15] eval(::Expr) at .\client.jl:467
      From worker 4:     [16] top-level scope at .\none:3
3

I don’t think so, but I don’t remember how I worked around this problem either.