During this build:

https://uberchromegw.corp.google.com/i/chromeos/builders/master-paladin/builds/12120

https://uberchromegw.corp.google.com/i/chromeos/builders/master-paladin/builds/12120/steps/CommitQueueSync/logs/stdio

The CommitQueueSync process seems to commit many (all?) CLs, but takes over 2 hours to do it.

With the given logs, it's impossible to tell if it just ran really slowly, or ran quickly and then hung.