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test(operations): a worker a process test cannot stop shows where it is stuck

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CI once found a test worker still running 15 s after SIGTERM, and the
failure said nothing more. The worker children now dump their threads'
stacks on SIGUSR1, and tearDown sends it to a child that is still alive
before killing it, so the next such failure names the place.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
catborise 2026-10-21 12:05:55 +03:00
parent c4ab14db7f
commit 6ddde9376c
1 changed files with 4 additions and 0 deletions
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4
operations/tests/test_processes.py
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@ -1,6 +1,7 @@
"""Real processes: a worker killed at each point is recovered by the next; """Real processes: a worker killed at each point is recovered by the next;
one worker per host; concurrent admissions and submissions never double up.""" one worker per host; concurrent admissions and submissions never double up."""
import faulthandler
import multiprocessing import multiprocessing
import os import os
import shutil import shutil
@ -19,6 +20,7 @@ from operations.tests import fakes, proc_kinds # noqa: F401
def _worker(data): def _worker(data):
connections.close_all() connections.close_all()
faulthandler.register(signal.SIGUSR1, all_threads=True) # tearDown asks a stuck worker where it is
from operations.worker import Worker from operations.worker import Worker
os._exit(Worker(tick=0.05, heartbeat_every=0.2, grace=1, data=data).run()) os._exit(Worker(tick=0.05, heartbeat_every=0.2, grace=1, data=data).run())
@ -60,6 +62,8 @@ class ProcessTestCase(TransactionTestCase):
def tearDown(self): def tearDown(self):
for p in self.children: for p in self.children:
if p.is_alive(): if p.is_alive():
os.kill(p.pid, signal.SIGUSR1) # its threads' stacks go to stderr
p.join(1)
p.kill() p.kill()
p.join(10) p.join(10)
shutil.rmtree(self.dir, ignore_errors=True) shutil.rmtree(self.dir, ignore_errors=True)