Hacktoberfest 2026: los issues que los mantenedores marcaron para octubre, abiertos y aptos para principiantes. Explorar issues de Hacktoberfest

juliacall: Julia GC triggered from a python thread causes hangs

Abierto
  • ¿Algo no está bien?
#578 3 comentarios 1 reacción 0 asignados Ver en GitHub

Los mantenedores suelen responder en 1 día

Nadie ha tomado este issue todavía.

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
30/100
Tipo de issue
Error
Claridad
Necesita aclaración
Estado de actividad
Estancado
Stack tecnológico
julia, python
Área
backend

Línea de trabajo

Comienza ejecutando el reproductor de Python threading proporcionado con JuliaCall e inspecciona las rutas de llamada de PythonCall JlWrap/any.jl y JlWrap/base.jl mostradas en el stack trace. Compara el comportamiento con el GC de Julia habilitado y deshabilitado; se considera terminado cuando la llamada de GC en el contexto de threading se completa sin bloquearse en los entornos indicados.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug

Affects: JuliaCall

Describe the bug
I am seeing Julia tasks launched from parallel python threads lead to sporadic hangs. Short-running tasks suffer less from this. I had no luck using the tricks from #539 or here. I think the hangs are triggered by Julia GC - disabling GC with Base.GC.enable(false) beforehand seems to fix the hangs - and triggering Julia GC manually from a python thread immediately causes a hang.

This is all with PYTHON_JULIACALL_HANDLE_SIGNALS set to yes, in case that matters.

from juliacall import Main as jl
jl_gc = jl.Base.GC.gc

import threading
t = threading.Thread(target=jl_gc)
t.start()  # hangs every time (100% CPU)

Terminating python gives me

[89363] signal (15): Terminated: 15
in expression starting at none:0
jl_gc_wait_for_the_world at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gc.c:241 [inlined]
ijl_gc_collect at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gc.c:3515
gc at ./gcutils.jl:129 [inlined]
gc at ./gcutils.jl:129 [inlined]
pyjlany_call at /Users/username/.julia/packages/PythonCall/Nr75f/src/JlWrap/any.jl:45
_jl_invoke at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gf.c:0 [inlined]
ijl_apply_generic at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gf.c:3077
(pyproj) c889f3b4c8d7:pyproj username$ _pyjl_callmethod at /Users/username/.julia/packages/PythonCall/Nr75f/src/JlWrap/base.jl:73
_pyjl_callmethod at /Users/username/.julia/packages/PythonCall/Nr75f/src/JlWrap/C.jl:63
jfptr__pyjl_callmethod_9032 at /Users/username/.julia/compiled/v1.10/PythonCall/WdXsa_v1O0R.dylib (unknown line)
_jl_invoke at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gf.c:0 [inlined]
ijl_apply_generic at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-10/src/gf.c:3077
jlcapi__pyjl_callmethod_9116 at /Users/username/.julia/compiled/v1.10/PythonCall/WdXsa_v1O0R.dylib (unknown line)
method_vectorcall_VARARGS at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
PyObject_Vectorcall at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
_PyEval_EvalFrameDefault at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
_PyObject_FastCallDictTstate at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
slot_tp_call at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
_PyObject_Call at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
_PyEval_EvalFrameDefault at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
method_vectorcall at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
thread_run at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
pythread_wrapper at /Users/username/miniforge3/envs/pyproj/bin/python3.12 (unknown line)
_pthread_start at /usr/lib/system/libsystem_pthread.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0)
Allocations: 3689147 (Pool: 3684864; Big: 4283); GC: 6

Your system

  • MacOS, Apple Silicon, Julia 1.10.5
  • Linux, x86_64, Julia 1.10.6
  • PythonCall/juliacall 0.9.23
Lenguaje dominante
Julia
Estrellas
1.1k
Forks
89
Merge medio
2 d 15 h
PR fusionados (30 d)
7

Preparar el entorno

Este proyecto no incluye contenedor de desarrollo, Dockerfile ni guía de contribución, así que la configuración corre por tu cuenta: empieza por su README y consulta nuestra guía para la primera contribución para los pasos generales.

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

Más de JuliaPy/PythonCall.jl

Todos los issues de JuliaPy/PythonCall.jl

Issues similares

Más issues de Julia

Recibe los nuevos issues en tu correo

Un resumen breve de issues de GitHub para principiantes.