We have instances that get stuck / freeze and can do no IO

Candidate: tools-exec-1217

Details:

44efcd75-808a-4af2-8c7a-8d70b703d7f2
labvirt1001.eqiad.wmnet
i-00000bde

Process info:

https://phabricator.wikimedia.org/P3886#18575

strace of (only) running subprocess:

https://phabricator.wikimedia.org/P3886#18576

gdb attach of running subprocess:

https://phabricator.wikimedia.org/P3886#18577

Active open files:

https://phabricator.wikimedia.org/P3886#18578


proc io information:

https://phabricator.wikimedia.org/P3886#18579