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AMD64 Ubuntu Shared 3.x buildbot started to fail today:
- https://buildbot.python.org/all/#/builders/506/builds/3401
- https://buildbot.python.org/all/#/builders/506/builds/3404
David Bolen, the buildbot owner, found logs of Linux OOM:
Oct 18 11:27:39 buildbot-ubuntu kernel: [34420581.683539] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user.slice,task=python,pid=18752,uid=1000
Oct 18 11:27:39 buildbot-ubuntu kernel: [34420581.683565] Out of memory: Killed process 18752 (python) total-vm:1381868kB, anon-rss:725500kB, file-rss:0kB, shmem-rss:0kB, UID:1000 pgtables:1748kB oom_score_adj:0
Oct 18 11:27:39 buildbot-ubuntu kernel: [34420581.795140] oom_reaper: reaped process 18752 (python), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB
and also 340 processes like python -c import time; time.sleep(100000000). These processes are likely spawned by test_kill_issue43884() of test_asyncio.test_subprocess.
Maybe PR #32073 introduced a regression test_asyncio. My comment on the PR: #32073 (comment)
Emails about this issue on buildbot-status mailing list: https://mail.python.org/archives/list/buildbot-status@python.org/thread/ZLG6D5L4SJVS6VHHCC6S2P4OZ63SCXO3/
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