Taken twistd.log

2017-09-07 12:24:01-0700 [-] calling during/after trigger: <bound method SelectReactor.crash of <twisted.internet.selectreactor.SelectReactor object at 0x10a782810>>
2017-09-07 12:24:01-0700 [-] calling during/after trigger: <bound method SelectReactor.disconnectAll of <twisted.internet.selectreactor.SelectReactor object at 0x10a782810>>
2017-09-07 12:24:01-0700 [Broker,client] lost remote
2017-09-07 12:24:01-0700 [Broker,client] Lost connection to master1.golo.chromium.org:8111
2017-09-07 12:24:01-0700 [Broker,client] Stopping factory <buildslave.bot.BotFactory instance at 0x10aafcb00>
2017-09-07 12:24:01-0700 [-] calling during/after trigger: <function stop_timeseries_monitoring at 0x10aa839b0>
2017-09-07 12:24:01-0700 [-] calling during/after trigger: <bound method SelectReactor._stopThreadPool of <twisted.internet.selectreactor.SelectReactor object at 0x10a782810>>
2017-09-07 12:24:01-0700 [-] finished firing system event
2017-09-07 12:24:01-0700 [-] Main loop terminated.
2017-09-07 12:24:01-0700 [-] Server Shut Down.


slave didn't reconnect to master after master restart happened?

I restarted vms other than
https://luci-milo.appspot.com/buildbot/chromium.fyi/CrWinGoma/

My restart looks not fix.

Hmm, I've also restarted a vm manually, but slave does not start.

$ make

in slave dir does not work.
I couldn't register org.chromium.buildbot.slave to launchctl


chrome-bot@vm657-m1:(Mac 10.12.2):/b/build$ launchctl list | grep chromium
-	1	org.chromium.infra.service_manager.agent
chrome-bot@vm657-m1:(Mac 10.12.2):/b/build$ launchctl start org.chromium.buildbot.slave
[3] chrome-bot@vm657-m1:(Mac 10.12.2):/b/build$ 

Python seems to be broken. Filed trooper bug issue 763925

Has this been resolved? Can we close it?

I think so.