# Trouble using Distributed in Juno with non-default environment

**URL:** <https://discourse.julialang.org/t/trouble-using-distributed-in-juno-with-non-default-environment/49603>\
**Category:** General Usage\
**Tags:** juno, distributed\
**Created:** [November 4, 2020, 9:05pm UTC](https://discourse.julialang.org/t/trouble-using-distributed-in-juno-with-non-default-environment/49603 "2020-11-04T21:05:17Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![yha](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yha/32/3502_2.png) [@yha](https://discourse.julialang.org/u/yha)\
**Post date:** [November 4, 2020, 9:05pm UTC](https://discourse.julialang.org/t/trouble-using-distributed-in-juno-with-non-default-environment/49603/1 "2020-11-04T21:05:17Z")

</div>

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:

```julia
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

```julia
     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
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

```

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<div class="post-metadata">

**Author:** ![bernhard](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bernhard/32/2619_2.png) [@bernhard](https://discourse.julialang.org/u/bernhard)\
**Post date:** [September 10, 2021, 2:17pm UTC](https://discourse.julialang.org/t/trouble-using-distributed-in-juno-with-non-default-environment/49603/2 "2021-09-10T14:17:07Z")

</div>

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

```julia
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

```

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<div class="post-metadata">

**Author:** ![yha](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yha/32/3502_2.png) [@yha](https://discourse.julialang.org/u/yha)\
**Post date:** [September 10, 2021, 3:08pm UTC](https://discourse.julialang.org/t/trouble-using-distributed-in-juno-with-non-default-environment/49603/3 "2021-09-10T15:08:53Z")

</div>

> [@bernhard](#):
>
> did you find out what caused this?

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