Github user ProjectMoon commented on the issue:
https://github.com/apache/cloudstack/pull/1900
@anshul1886 I have not delved too deeply into the state machine transition
code, though I understand the basics of how it works. I think `synchronized` +
state transition should be enough in a single management server scenario, but
will it work in a clustered scenario? Of course, `synchronized` cannot lock
across processes, which is why CS has the database locks everywhere. If the
state transitions will work in a clustered scenario, then I'm fine with just
using that one.
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