[tahoe-lafs-trac-stream] [tahoe-lafs] #1749: bug in mutable publish that could cause an IndexError when a writer is removed in Publish._connection_problem

[tahoe-lafs]

#1749: bug in mutable publish that could cause an IndexError when a writer is
removed in Publish._connection_problem
--------------------------------------------+-----------------------
 Reporter:  davidsarah                      |          Owner:
     Type:  defect                          |         Status:  new
 Priority:  critical                        |      Milestone:  1.9.2
Component:  code-mutable                    |        Version:  1.9.1
 Keywords:  publish regression test-needed  |  Launchpad Bug:
--------------------------------------------+-----------------------
 {{{
 "Traceback (most recent call last):
 Failure: allmydata.mutable.common.NotEnoughServersError: (\"Publish ran
 out of good servers, last failure was:
 [Failure instance: Traceback: <type 'exceptions.IndexError'>: list index
 out of range
 /home/davidsarah/cloud-branch/support/lib/python2.6/site-
 packages/Twisted-12.0.0-py2.6-linux-i686.egg/twisted/internet/base.py:800:runUntilCurrent
 /home/davidsarah/cloud-branch/support/lib/python2.6/site-
 packages/foolscap-0.6.3-py2.6.egg/foolscap/eventual.py:26:_turn
 /home/davidsarah/cloud-branch/support/lib/python2.6/site-
 packages/Twisted-12.0.0-py2.6-linux-i686.egg/twisted/internet/defer.py:368:callback
 /home/davidsarah/cloud-branch/support/lib/python2.6/site-
 packages/Twisted-12.0.0-py2.6-linux-i686.egg/twisted/internet/defer.py:464:_startRunCallbacks
 (04:15:44) davidsarah: --- <exception caught here> ---\\n/home/davidsarah
 /cloud-branch/support/lib/python2.6/site-
 packages/Twisted-12.0.0-py2.6-linux-i686.egg/twisted/internet/defer.py:551:_runCallbacks
 /home/davidsarah/cloud-branch/src/allmydata/mutable/publish.py:634:_push
 /home/davidsarah/cloud-
 branch/src/allmydata/mutable/publish.py:651:push_segment
 /home/davidsarah/cloud-branch/src/allmydata/mutable/publish.py:637:_push
 /home/davidsarah/cloud-
 branch/src/allmydata/mutable/publish.py:773:push_everything_else
 /home/davidsarah/cloud-
 branch/src/allmydata/mutable/publish.py:878:finish_publishing
 /home/davidsarah/cloud-
 branch/src/allmydata/mutable/publish.py:886:_record_verinfo
 }}}

 I can reproduce this, at least on the cloud-branch, when I do a {{{tahoe
 put --mutable}}} shortly after the gateway has started.

-- 
Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1749>
tahoe-lafs <https://tahoe-lafs.org>
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