[Buildbot] #3486: Interrupted a builder that was waiting for a lock (running another build with the lock), lock was never released

[Buildbot trac]

#3486: Interrupted a builder that was waiting for a lock (running another build
with the lock), lock was never released
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Reporter:  RockHed    |      Owner:
    Type:  undecided  |     Status:  new
Priority:  major      |  Milestone:  undecided
 Version:  0.8.12     |   Keywords:  locks
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 My slave allows a max of 2 builds, but I use SlaveLock on certain steps.
 At one point, a build was running that took the lock, and another build
 was waiting for the lock.  I had to interrupt the build that was waiting,
 and I also had to restart the slave around the same time. As a result,
 after it came up, all builds were stuck in waiting for that lock, so it
 seems somewhere it was taken and not released.

 Work-around is to rename the lock and reconfigure, and possibly stop/start
 the master (untested yet) with the original config.

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Ticket URL: <http://trac.buildbot.net/ticket/3486>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation