[Buildbot-commits] [Buildbot] #1036: buildrequest can be multiply claimed on MySQL

[Buildbot]

#1036: buildrequest can be multiply claimed on MySQL
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Reporter:  dustin    |       Owner:
    Type:  defect    |      Status:  closed
Priority:  blocker   |   Milestone:  0.8.5
 Version:  0.8.1     |  Resolution:  fixed
Keywords:  database  |
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Changes (by Dustin J. Mitchell):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 Use atomic inserts to claim build requests

 This differs from the previous practice of trying to update rows to
 reflect a claim, which is not possible in an atomic fashion across all
 database engines.  This brings a few non-compatible changes:

 The db.buildrequests.claimBuildRequests method can no longer re-claim
 already-claimed requests; use reclaimBuildRequests instead.  The
 database no longer tracks master instances, so the
 unclaimOldIncarnationRequests method has been removed.  Note that
 several of the methods in this module now perform fewer consistency
 checks, for efficiency.

 Requests are now claimed to a particular master, but not to a particular
 "incarnation" of that master.  The identity of the master is drawn from
 the existing objects table.

 This commit upgrades the database to version 11.  Fixes #1036.
  Changeset: 8b1cee84683fd185d46aea193a01f2b42b4f5503

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Ticket URL: <http://trac.buildbot.net/ticket/1036#comment:6>
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