Open
Description
Julia Version: 1.10.5+0.x64.linux.gnu (installed by juliaup)
OS/Architecture: Linux x86_64, Ubuntu 22.04
Summary:
Attempting to broadcast a function object defined in the main process's REPL to worker processes using @eval @everywhere f_every = $f results in an UndefVarError: #f not defined on the workers. This suggests an issue with serializing and deserializing a REPL-defined function.
Minimal Working Example (MWE):
using Distributed
addprocs(2)
# Define a function on the main process
f(a) = a
# Attempt to send the function object to all workers
@eval @everywhere f_every = $fExpected Behavior:
The function f should be successfully serialized, sent to the worker processes, and assigned to the variable f_every on each worker without error.
Actual Behavior:
The command fails with an error on the worker processes:
ERROR: On worker 2:
UndefVarError: `#f` not defined
Stacktrace:
[1] deserialize_datatype
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:1399
[2] handle_deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:867
[3] deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:814
[4] handle_deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:874
[5] deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:814
[6] deserialize_expr
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:1291
[7] handle_deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:894
[8] deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:814
[9] deserialize_expr
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:1291
[10] handle_deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:894
[11] deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:814
[12] #5
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:973
[13] ntupleany
@ ./ntuple.jl:43
[14] deserialize_tuple
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:973
[15] handle_deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:857
[16] deserialize
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Serialization/src/Serialization.jl:814 [inlined]
[17] deserialize_msg
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/messages.jl:87
[18] #invokelatest#2
@ ./essentials.jl:892 [inlined]
[19] invokelatest
@ ./essentials.jl:889 [inlined]
[20] message_handler_loop
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/process_messages.jl:176
[21] process_tcp_streams
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/process_messages.jl:133
[22] #103
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/process_messages.jl:121
...and 1 more exception.
Stacktrace:
[1] sync_end(c::Channel{Any})
@ Base ./task.jl:455
[2] macro expansion
@ ./task.jl:487 [inlined]
[3] remotecall_eval(m::Module, procs::Vector{Int64}, ex::Expr)
@ Distributed /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/macros.jl:219
[4] top-level scope
@ /media/Big/replaceC/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/Distributed/src/macros.jl:203
[5] eval(m::Module, e::Any)
@ Core ./boot.jl:385
[6] top-level scope
@ REPL[5]:1
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