[tahoe-lafs-trac-stream] [tahoe-lafs] #1628: UCWE on deep check with recent version

[tahoe-lafs]

#1628: UCWE on deep check with recent version
------------------------------------------------+--------------------------
 Reporter:  davidsarah                          |          Owner:  somebody
     Type:  defect                              |         Status:  new
 Priority:  major                               |      Milestone:
Component:  code                                |  undecided
 Keywords:  tahoe-check verify ucwe regression  |        Version:  1.9.0
                                                |  Launchpad Bug:
------------------------------------------------+--------------------------
 [https://tahoe-lafs.org/pipermail/tahoe-dev/2011-November/006870.html
 Reported by kpreid]:
 I upgraded my tahoe to a recent development version, in the git mirror:
 {{{
   git://github.com/warner/tahoe-lafs.git
   commit b73aba98de93c4c0b0013f1dd435c64e73e48f4c
 }}}

 Now, my daily deep-check --repair --add-lease on my four aliases on the
 volunteer grid consistently fails as follows. The first might have a
 legitimate uncoordinated write, but the last two are not regularly touched
 by anything but the repair process, and this identical failure has
 occurred for the past 4 days.

 I'd appreciate it if this is fixed before my leases expire. :-)
 {{{
 -----------------------------------------------------------------------
 ERROR: UncoordinatedWriteError()
 "[Failure instance: Traceback (failure with no frames): <class
 'allmydata.mutable.common.UncoordinatedWriteError'>: "

 ERROR: AssertionError()
 "[Failure instance: Traceback: <type 'exceptions.AssertionError'>: "
 /Volumes/Opp/External/Projects/tahoe/src/allmydata/mutable/filenode.py:563:upload
 /Volumes/Opp/External/Projects/tahoe/src/allmydata/mutable/filenode.py:661:_do_serialized
 /Volumes/Opp/External/Projects/tahoe/support/lib/python2.6/site-
 packages/Twisted-11.1.0-py2.6-macosx-10.6-x86_64.egg/twisted/internet/defer.py:298:addCallback
 /Volumes/Opp/External/Projects/tahoe/support/lib/python2.6/site-
 packages/Twisted-11.1.0-py2.6-macosx-10.6-x86_64.egg/twisted/internet/defer.py:287:addCallbacks
 --- <exception caught here> ---
 /Volumes/Opp/External/Projects/tahoe/support/lib/python2.6/site-
 packages/Twisted-11.1.0-py2.6-macosx-10.6-x86_64.egg/twisted/internet/defer.py:545:_runCallbacks
 /Volumes/Opp/External/Projects/tahoe/src/allmydata/mutable/filenode.py:661:<lambda>
 /Volumes/Opp/External/Projects/tahoe/src/allmydata/mutable/filenode.py:689:_upload
 /Volumes/Opp/External/Projects/tahoe/src/allmydata/mutable/publish.py:402:publish

 ERROR: UncoordinatedWriteError()
 "[Failure instance: Traceback (failure with no frames): <class
 'allmydata.mutable.common.UncoordinatedWriteError'>: "

 ERROR: UncoordinatedWriteError()
 "[Failure instance: Traceback (failure with no frames): <class
 'allmydata.mutable.common.UncoordinatedWriteError'>: "
 -----------------------------------------------------------------------
 }}}
 Before these failures, here is a typical example of normal results. (The
 indentation is added by my script.) I had understood the post-repair
 unhealthiness to be due to disagreement between the "healthy file" and
 "repair (successful re-upload)", a to-be-fixed bug.
 {{{
 -----------------------------------------------------------------------
         done: 3 objects checked
          pre-repair: 3 healthy, 0 unhealthy
          0 repairs attempted, 0 successful, 0 failed
          post-repair: 3 healthy, 0 unhealthy

          repair successful
         done: 1 objects checked
          pre-repair: 0 healthy, 1 unhealthy
          1 repairs attempted, 1 successful, 0 failed
          post-repair: 0 healthy, 1 unhealthy

          repair successful
         done: 5 objects checked
          pre-repair: 4 healthy, 1 unhealthy
          1 repairs attempted, 1 successful, 0 failed
          post-repair: 4 healthy, 1 unhealthy

          repair successful
         done: 5 objects checked
          pre-repair: 4 healthy, 1 unhealthy
          1 repairs attempted, 1 successful, 0 failed
          post-repair: 4 healthy, 1 unhealthy
 }}}

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1628>
tahoe-lafs <https://tahoe-lafs.org>
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