[Buildbot] #3012: SVNPoller gets stuck.

[Buildbot trac]

#3012: SVNPoller gets stuck.
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Reporter:  Ben     |       Owner:
    Type:  defect  |      Status:  new
Priority:  major   |   Milestone:  0.9.0
 Version:  master  |  Resolution:
Keywords:          |
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Comment (by Ben):

 So it looks like the same trouble as #2959. The master fears that he is in
 a multi-master setup, and hence doesn't dare overwriting some (wrong) DB
 values, and hence stays in an inconsistent state ... That smells pretty
 bad ...

 While we can probably fix it for this case, we really need to think of
 some better guard against those troubles (this and #2959). As it **will**
 happen again !

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Ticket URL: <http://trac.buildbot.net/ticket/3012#comment:8>
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