Sample crash:
  https://uberchromegw.corp.google.com/i/chromeos/builders/pre-cq-launcher/builds/7013/steps/PreCQLauncher/logs/stdio

Sample bad behavior:
  https://uberchromegw.corp.google.com/i/chromeos/builders/pre-cq-launcher/builds/7015/steps/PreCQLauncher/logs/stdio

We generally think that GoB is giving inconsistent results which are confusing the launcher, but haven't yet proved that.

The current run seems hung in 
19:05:49: INFO: Refreshing due to a 401 (attempt 1/2)
19:05:49: INFO: Refreshing access_token

Can't find such logging line in chromite source tree, so not sure where exactly we are hung. I'm going to try to kick the builder.

pre-cq seems un-hung now
https://uberchromegw.corp.google.com/i/chromeos/builders/pre-cq-launcher/builds/7016/steps/PreCQLauncher/logs/stdio

reducing priority

The recent 7017 and 7018 build successful.