[Buildbot] #3420: tests are failing when using MySQL database backend

[Buildbot trac]

#3420: tests are failing when using MySQL database backend
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Reporter:  rutsky     |       Owner:  dustin
    Type:  undecided  |      Status:  assigned
Priority:  major      |   Milestone:  undecided
 Version:  master     |  Resolution:
Keywords:             |
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Comment (by dustin):

 To be clear, #3421 is about MySQL-5.7 compatibility.  This bug should be
 solved by
   https://github.com/buildbot/buildbot/pull/1967
 and we should have green test runs with the MySQL-5.5 docker images.

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Ticket URL: <http://trac.buildbot.net/ticket/3420#comment:6>
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