Probably https://github.com/JuliaLang/julia/issues/8631 (although I think
this example alone runs fine; maybe you're loading Color.jl somewhere?)
Simon
On Friday, October 17, 2014 5:21:30 PM UTC-4, Spencer Lyon wrote:
>
> Consider this very simple example
>
> if nprocs() == 1
> addprocs(2)
> end
>
> ll2(F::Matrix, G::Matrix, H::Matrix, obs::Matrix) = sum(F*G*obs*obs'*H)
>
> function create_ll2_args()
> obs = rand(3, 50)
> [(randn(3, 3) * .5, randn(3, 3)*.2, eye(3), obs) for i=1:2]
> end
>
> function works_with_map()
> args = create_ll2_args()
> map(x->ll2(x...), args)
> end
>
> function craps_out_with_pmap()
> args = create_ll2_args()
> pmap(x->ll2(x...), args)
> end
>
> Now see what happens when I call the last two functions
>
> julia> works_with_map()
> 2-element Array{Float64,1}:
> 6.60313
> 8.82563
>
> julia> workers() # make sure I have workers
> 2-element Array{Int64,1}:
> 2
> 3
>
> julia> craps_out_with_pmap()
> fatal error on fatal error on 23: : ERROR: `convert` has no method matching
> convert(::Type{Int64...}, ::Int64)
> in convert at base.jl:13
> in convert at ./base.jl:21
> in deserialize at serialize.jl:447
> in handle_deserialize at serialize.jl:351
> in deserialize at serialize.jl:334
> in anonymous at serialize.jl:354
> in ntuple at tuple.jl:30
> in deserialize_tuple at serialize.jl:354
> in handle_deserialize at serialize.jl:346
> in deserialize at serialize.jl:334
> in anonymous at serialize.jl:354
> in ntuple at tuple.jl:30
> in deserialize_tuple at serialize.jl:354
> in handle_deserialize at serialize.jl:346
> in anonymous at task.jl:853
> ERROR: `convert` has no method matching convert(::Type{Int64...}, ::Int64)
> in convert at base.jl:13
> in convert at ./base.jl:21
> in deserialize at serialize.jl:447
> in handle_deserialize at serialize.jl:351
> in deserialize at serialize.jl:334
> in anonymous at serialize.jl:354
> in ntuple at tuple.jl:30
> in deserialize_tuple at serialize.jl:354
> in handle_deserialize at serialize.jl:346
> in deserialize at serialize.jl:334
> in anonymous at serialize.jl:354
> in ntuple at tuple.jl:30
> in deserialize_tuple at serialize.jl:354
> in handle_deserialize at serialize.jl:346
> in anonymous at task.jl:853
> Worker 3 terminated.
> Worker 2 terminated.
> 2-element Array{Any,1}:
> ProcessExitedException()
> ProcessExitedException()
>
> I’m not sure what the problem is. I tried to follow the traceback and
> ended up at this line
> <https://github.com/JuliaLang/julia/blob/master/base/serialize.jl#L448>,
> but I’m not really sure what is going wrong or how to fix it. Any ideas?
>
> If this really is a bug we can create an issue for it…
>
> Thanks
>
>
