[tahoe-dev] [tahoe-lafs] #736: UnrecoverableFileError on directory which has 6 shares (3 needed)

[tahoe-lafs]

#736: UnrecoverableFileError on directory which has 6 shares (3 needed)
----------------------+-----------------------------------------------------
 Reporter:  zooko     |           Owner:  somebody
     Type:  defect    |          Status:  new     
 Priority:  major     |       Milestone:  1.5.0   
Component:  code      |         Version:  1.4.1   
 Keywords:  foolscap  |   Launchpad_bug:          
----------------------+-----------------------------------------------------
 When I view this private directory of mine, I get:

 {{{
 Error reading directory:

 UnrecoverableFileError: the directory (or mutable file) could not be
 retrieved, because there were insufficient good shares. This might
 indicate that no servers were connected, insufficient servers were
 connected, the URI was corrupt, or that shares have been lost due to
 server departure, hard drive failure, or disk corruption. You should
 perform a filecheck on this object to learn more.
 No upload forms: directory is unreadable
 }}}

 But when I run check (with or without verify) on it, I get:

 {{{
 {
  "results": {
   "needs-rebalancing": true,
   "count-shares-expected": 10,
   "healthy": false,
   "count-unrecoverable-versions": 0,
   "count-shares-needed": 3,
   "sharemap": {
    "seq29-5gk3-sh9": [
     "ivjakubrruewknqg7wgb5hbinasqupj6"
    ],
    "seq29-5gk3-sh8": [
     "xiktf6ok5f5ao5znxxttriv233hmvi4v"
    ],
    "seq29-5gk3-sh7": [
     "wfninubkrvhlyscum7rlschbhx5iarg3"
    ],
    "seq29-5gk3-sh4": [
     "xiktf6ok5f5ao5znxxttriv233hmvi4v"
    ],
    "seq29-5gk3-sh3": [
     "trjdor3okozw4eld3l6zl4ap4z6h5tk6"
    ],
    "seq29-5gk3-sh1": [
     "jfdpabh34vsrhll3lbdn3v23vem4hr2z"
    ]
   },
   "count-recoverable-versions": 1,
   "servers-responding": [
    "xiktf6ok5f5ao5znxxttriv233hmvi4v",
    "wfninubkrvhlyscum7rlschbhx5iarg3",
    "trjdor3okozw4eld3l6zl4ap4z6h5tk6",
    "jfdpabh34vsrhll3lbdn3v23vem4hr2z",
    "ivjakubrruewknqg7wgb5hbinasqupj6"
   ],
   "count-good-share-hosts": 5,
   "count-wrong-shares": 0,
   "count-shares-good": 6,
   "count-corrupt-shares": 0,
   "list-corrupt-shares": [],
   "recoverable": true
  },
  "storage-index": "iy5ilio6pjeehciu6idw4jzp6e",
  "summary": "Unhealthy: 6 shares (enc 3-of-10)"
 }
 }}}

 This may be related to #732 (Not Enough Shares when repairing a file which
 has 7 shares on 2 servers).

 Hm, my {{{twistd.log}}} ends with:

 {{{
 2009-06-14 14:06:52-0600 [Negotiation,client] Unhandled error in Deferred:
 2009-06-14 14:06:52-0600 [Negotiation,client] Unhandled Error
         Traceback (most recent call last):
           File
 "/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/support/lib/python2.5
 /site-packages/foolscap-0.4.1-py2.5.egg/foolscap/call.py", line 669, in
 _don
 e
             self.request.complete(res)
           File
 "/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/support/lib/python2.5
 /site-packages/foolscap-0.4.1-py2.5.egg/foolscap/call.py", line 55, in
 compl
 ete
             self.deferred.callback(res)
           File
 "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
 packages/Twisted-8.2.0-py2.5-macosx-10.3-i386.egg/twisted/internet/defer.py",
 line 243, in
 callback
             self._startRunCallbacks(result)
           File
 "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
 packages/Twisted-8.2.0-py2.5-macosx-10.3-i386.egg/twisted/internet/defer.py",
 line 312, in
 _startRunCallbacks
             self._runCallbacks()
         --- <exception caught here> ---
           File
 "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-
 packages/Twisted-8.2.0-py2.5-macosx-10.3-i386.egg/twisted/internet/defer.py",
 line 328, in
 _runCallbacks
             self.result = callback(self.result, *args, **kw)
           File
 "/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/src/allmydata/introducer/client.py",
 line 92, in _got_versioned_service
             self._ic.add_connection(self._nodeid, self.service_name, rref)
           File
 "/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/src/allmydata/introducer/client.py",
 line 270, in add_connection
             rsc.reset()
           File
 "/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/src/allmydata/introducer/client.py",
 line 105, in reset
             self._reconnector.reset()
         exceptions.AttributeError: RemoteServiceConnector instance has no
 attribute '_reconnector'
 }}}

 That looks like it is related to
 http://foolscap.lothar.com/trac/ticket/129 (zero-length location hints
 cause getReference() to fail synchronously).

-- 
Ticket URL: <http://allmydata.org/trac/tahoe/ticket/736>
tahoe-lafs <http://allmydata.org>
secure decentralized file storage grid