GNU bug report logs - #64530
29.0.91; many calls to make-process cause varying undesired behavior

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: ryan <at> piknikco.net
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.91; many calls to make-process cause varying undesired behavior
Date: Fri, 07 Jul 2023 21:57:47 +0000 (UTC)

I'm heavily using `make-process', creating around 60 processes each with
an `:stderr' pipe process. These are all SSH processes being issued in
parallel. I've had nothing but problems when forking around this many
processes or more. As a workaround I've made a process queue to limit
the maximum number of processes to around 50, and this seems to stop the
problem. This is all done in batch mode, or non-interactive use of
emacs. I'm also using threading functionality, but the issues remain
with or without the use of it.

The issues being experienced include a process made with `make-process'
that starts, `process-live-p' returns '(run open listen connect stop)
but neither the process sentinel or filter is ever called. It is
expected that at least the sentinel is called with the "run\n"
event. Secondly, sometimes emacs crashes and outputs a backtrace. The
backtrace is the following:

**
GLib:ERROR:../glib/glib/gmain.c:3536:g_main_context_acquire: assertion failed: (context->owner_count == 0)
Bail out! GLib:ERROR:../glib/glib/gmain.c:3536:g_main_context_acquire: assertion failed: (context->owner_count == 0)
Backtrace:
emacs(+0x15f50b)[0x558288e4950b]
emacs(+0x15f5ff)[0x558288e495ff]
/usr/lib/libc.so.6(+0x39ab0)[0x7f8d776fbab0]
/usr/lib/libc.so.6(+0x8926c)[0x7f8d7774b26c]
/usr/lib/libc.so.6(gsignal+0x18)[0x7f8d776fba08]
/usr/lib/libc.so.6(abort+0xd7)[0x7f8d776e4538]
/usr/lib/libglib-2.0.so.0(+0x1e05e)[0x7f8d7ab2f05e]
/usr/lib/libglib-2.0.so.0(g_assertion_message_expr+0x50)[0x7f8d7ab8fe90]
/usr/lib/libglib-2.0.so.0(g_main_context_acquire+0xa2)[0x7f8d7ab68cc2]
emacs(+0x28a241)[0x558288f74241]
emacs(+0x2394f7)[0x558288f234f7]
emacs(+0x23b622)[0x558288f25622]
emacs(+0x1d8531)[0x558288ec2531]
emacs(+0x1d8ec5)[0x558288ec2ec5]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1da57d)[0x558288ec457d]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1d9015)[0x558288ec3015]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1da175)[0x558288ec4175]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1d960d)[0x558288ec360d]
emacs(+0x22104f)[0x558288f0b04f]
emacs(+0x1d9b46)[0x558288ec3b46]
emacs(+0x1d7e47)[0x558288ec1e47]
emacs(+0x1d8459)[0x558288ec2459]
emacs(+0x1da3c1)[0x558288ec43c1]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1dab19)[0x558288ec4b19]
emacs(+0x1d8413)[0x558288ec2413]
emacs(+0x1d960d)[0x558288ec360d]
emacs(+0x1d9b46)[0x558288ec3b46]
emacs(+0x1d7e47)[0x558288ec1e47]
emacs(+0x1d960d)[0x558288ec360d]
emacs(+0x1d468e)[0x558288ebe68e]
emacs(+0x26190b)[0x558288f4b90b]
emacs(+0x1d2c57)[0x558288ebcc57]
emacs(+0x262245)[0x558288f4c245]
/usr/lib/libc.so.6(+0x8744b)[0x7f8d7774944b]
/usr/lib/libc.so.6(+0x10ae40)[0x7f8d777cce40]
...

Let me know how I can help debug and solve this issue. Thanks



In GNU Emacs 29.0.91 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.37, cairo version 1.17.8) of 2023-05-23 built on ca1
Repository revision: 117b29c6f6681e4ae0710a9f90f1b8d274afc7c0
Repository branch: makepkg
System Description: Arch Linux

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --mandir=/usr/share/man --with-gameuser=:games
 --with-modules --without-libotf --without-m17n-flt --without-gconf
 --with-native-compilation=yes --with-xinput2 --with-pgtk
 --without-xaw3d --with-sound=no --with-tree-sitter --without-gpm
 --without-compress-install
 '--program-transform-name=s/\([ec]tags\)/\1.emacs/'
 'CFLAGS=-march=native -O2 -pipe -fno-plt -fexceptions
 -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security
 -fstack-clash-protection -fcf-protection'
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK
PNG RSVG SECCOMP SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER
WEBP XIM GTK3 ZLIB

Important settings:
  value of $EMACSNATIVELOADPATH: /home/piknik/.local/var/lib/emacs/cache/eln-cache/
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  consult-org-roam-mode: t
  org-roam-db-autosync-mode: t
  shell-dirtrack-mode: t
  nameless-mode: t
  show-smartparens-mode: t
  smartparens-mode: t
  yas-minor-mode: t
  display-fill-column-indicator-mode: t
  auto-insert-mode: t
  global-corfu-mode: t
  corfu-mode: t
  gcmh-mode: t
  global-auto-revert-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  projectile-mode: t
  burly-tabs-mode: t
  server-mode: t
  savehist-mode: t
  marginalia-mode: t
  vertico-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  prettify-symbols-mode: t
  tab-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/piknik/.local/var/lib/emacs/packages/transient-20230315.1520/transient hides /usr/share/emacs/29.0.91/lisp/transient

Features:
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magit-sequence magit-notes magit-worktree magit-tag magit-merge
magit-branch magit-reset magit-files magit-refs magit-status magit
magit-repos magit-apply magit-wip magit-log which-func magit-diff
smerge-mode git-commit log-edit pcvs-util add-log magit-core
magit-autorevert magit-margin magit-transient magit-process magit-mode
transient magit-git magit-base smtpmail rng-xsd xsd-regexp rng-cmpct
rng-nxml rng-valid nxml-mode nxml-outln nxml-rap sgml-mode facemenu
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semantic/symref/grep semantic/symref semantic/util-modes semantic/util
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pk-init-mode-elfeed elfeed-show elfeed-search elfeed-csv elfeed
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dom python treesit ob-shell ob-eshell ob-ledger org ob ob-tangle ob-ref
ob-lob ob-table ob-exp org-macro org-src ob-comint org-pcomplete
org-list avl-tree org-footnote org-faces org-entities noutline outline
ob-emacs-lisp ob-core ob-eval org-cycle org-table ol org-fold
org-fold-core org-keys oc org-loaddefs find-func cal-menu calendar
cal-loaddefs org-version org-compat org-macs emacsql-sqlite
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diff-mode vc-dispatcher password-store-otp misearch multi-isearch pass f
f-shortdoc s imenu password-store auth-source-pass with-editor
ace-window tramp-cmds tramp-cache time-stamp tramp-sh tramp-container
tramp tramp-loaddefs trampver tramp-integration tramp-compat parse-time
iso8601 ls-lisp format-spec pk-init-mode-avy avy time-date mwim
pcmpl-unix pk-init-mode-eshell em-unix em-term pk-init-mode-term term
disp-table shell ehelp em-script em-prompt em-ls em-hist em-pred em-glob
em-extpipe em-cmpl em-dirs esh-var pcomplete em-basic em-banner em-alias
esh-mode eshell esh-cmd generator esh-ext esh-opt esh-proc esh-io
esh-arg esh-module esh-groups esh-util files-x doom-one-theme
doom-themes doom-themes-base pk-init-mode-consult consult-vertico
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Memory information:
((conses 16 7432395 1992745)
 (symbols 48 270459 20)
 (strings 32 717445 408227)
 (string-bytes 1 21688060)
 (vectors 16 214582)
 (vector-slots 8 4379427 1173482)
 (floats 8 1510 5984)
 (intervals 56 305806 117086)
 (buffers 984 409))

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