id summary reporter owner description type status priority milestone component version resolution keywords cc launchpad_bug 732 Not Enough Shares when repairing a file which has 7 shares on 2 servers zooko zooko "My demo at the Northern Colorado Linux Users Group had an unfortunate climactic conclusion when someone (whose name I didn't catch) asked about repairing damaged files, so I clicked the check button with the ""repair"" checkbox turned on, and got this: {{{ NotEnoughSharesError: no shares could be found. Zero shares usually indicates a corrupt URI, or that no servers were connected, but it might also indicate severe corruption. You should perform a filecheck on this object to learn more. }}} I couldn't figure it out and had to just bravely claim that Tahoe had really great test coverage and this sort of unpleasant surprise wasn't common. I also promised to email them all with the explanation, so I'm subscribing to the NCLUG mailing list so that I can e-mail the URL to this ticket. :-) The problem remains reproducible today. I have a little demo grid with an introducer, a gateway, and two storage servers. The gateway has storage service turned off. I have a file stored therein with 3-of-10 encoding, and I manually {{{rm}}}'ed three shares from one of the storage servers. Check correctly reports says: {{{ ""summary"": ""Not Healthy: 7 shares (enc 3-of-10)"" }}} Check also works with the ""verify"" checkbox turned on. When I try to repair I get thie Not Enough Shares error and an incident report like this one (full incident report file attached): {{{ 07:03:12.747 [5977]: web: 127.0.0.1 GET /uri/[CENSORED].. 200 308553 07:03:25.604 [5978]: (u7rxp): starting repair 07:03:25.604 [5979]: CHKUploader starting 07:03:25.604 [5980]: starting upload of 07:03:25.604 [5981]: creating Encoder 07:03:25.604 [5982]: (u7rxpbtbw5wb): starting download 07:03:25.613 [5983]: SCARY (u7rxpbtbw5wb): download failed! FAILURE: [CopiedFailure instance: Traceback from remote host -- Traceback (most recent call last): File ""/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/src/allmydata/immutable/repairer.py"", line 69, in start d2 = dl.start() File ""/Users/wonwinmcbrootles/playground/allmydata/tahoe/trunk/trunk/src/allmydata/immutable/download.py"", line 715, in start d.addCallback(self._got_all_shareholders) 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 195, in addCallback callbackKeywords=kw) 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 186, in addCallbacks self._runCallbacks() --- --- 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/immutable/download.py"", line 810, in _got_all_shareholders self._verifycap.needed_shares) allmydata.interfaces.NotEnoughSharesError: Failed to get enough shareholders ] [INCIDENT-TRIGGER] 07:03:26.253 [5984]: web: 127.0.0.1 POST /uri/[CENSORED].. 410 234 }}}" defect closed major 1.5.0 code-encoding 1.4.1 fixed repair process kpreid