JuliaPluto/Pluto.jl

Pluto ignores stop signals

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#228 opened on Jul 23, 2020

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 (8 comments) (2 reactions) (0 assignees)Julia (5,295 stars) (329 forks)batch import
backendbuggood first issuehelp welcome

Description

Hi!

First, thanks for Pluto! :)

I've just run into this problem using Julia 1.4.2 and Pluto v0.11.0 in Ubuntu and Chrome.

Error deserializing a remote exception from worker 2
Remote(original) exception of type MethodError
Remote stacktrace : 
convert at ./missing.jl:69
convert at ./essentials.jl:310 (repeats 4 times)
Tuple at ./namedtuple.jl:110
convert at ./namedtuple.jl:105
fetch_formatted_result at /home/elin/.julia/packages/Pluto/zIhY2/src/runner/PlutoRunner.jl:34
top-level scope at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/WorkspaceManager.jl:0
eval at ./boot.jl:331
#104 at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/process_messages.jl:294
run_work_thunk at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/process_messages.jl:79
macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/process_messages.jl:294 [inlined]
#103 at ./task.jl:358
Stacktrace:
 [1] remotecall_fetch(::Function, ::Distributed.Worker, ::Module, ::Vararg{Any,N} where N; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/remotecall.jl:390
 [2] remotecall_fetch(::Function, ::Distributed.Worker, ::Module, ::Vararg{Any,N} where N) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/remotecall.jl:382
 [3] #remotecall_fetch#144 at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/remotecall.jl:417 [inlined]
 [4] remotecall_fetch at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/remotecall.jl:417 [inlined]
 [5] remotecall_eval at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.4/Distributed/src/macros.jl:240 [inlined]
 [6] eval_fetch_in_workspace(::Pluto.WorkspaceManager.Workspace, ::Expr, ::Base.UUID, ::Bool) at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/WorkspaceManager.jl:153
 [7] eval_fetch_in_workspace at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/WorkspaceManager.jl:119 [inlined]
 [8] run_single!(::Notebook, ::Cell) at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/Run.jl:81
 [9] run_reactive!(::Pluto.ServerSession, ::Notebook, ::Pluto.NotebookTopology, ::Pluto.NotebookTopology, ::Array{Cell,1}; deletion_hook::Function) at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/Run.jl:67
 [10] run_reactive! at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/Run.jl:24 [inlined]
 [11] macro expansion at /home/elin/.julia/packages/Pluto/zIhY2/src/evaluation/Run.jl:11 [inlined]
 [12] (::Pluto.var"#68#69"{Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}},Pluto.ServerSession,Notebook,Array{Cell,1},Pluto.NotebookTopology,Pluto.NotebookTopology})() at ./task.jl:358[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.
[ Info: Tried to stop idle workspace - ignoring.

Thanks

Contributor guide

Tech stack
None
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
JuliaPluto.jl internalsdistributed computing
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The error occurs during workspace cleanup with repeated 'Tried to stop idle workspace ignoring.' Investigate the stop signal handling in WorkspaceManager.jl and PlutoRunner.jl. The stack trace shows an error in deserializing a remote exception. Look at the conversion functions in namedtuple.jl and missing.jl. Check if there is a race condition in workspace termination.