ERROR: UnrecoverableFileError(no recoverable versions)

[gennylee]

I configured tahoe-lafs with 5 node, and I configured shares.needed=2, shares.happy=3 and shares.total=5 in the tahoe-client. I turned off all but one my storage's server when i restarted my server, my tahoe-storage configuration say:

ERROR: UnrecoverableFileError(no recoverable versions)
"[Failure instance: Traceback: <class 'allmydata.mutable.common.UnrecoverableFileError'>: no recoverable versions"
/usr/lib/python2.7/dist-packages/twisted/internet/base.py:800:runUntilCurrent
/usr/lib/python2.7/dist-packages/foolscap/eventual.py:26:_turn
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:362:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:458:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:545:_runCallbacks
/root/allmydata-tahoe-1.10.0/src/allmydata/mutable/filenode.py:400:_get_version

How can I resolve this? Do it possible that I error to write the configuration? Thanks

[zooko]

Since you set shares.needed=2, then you have to have at least two storage servers running in order to recover files. What did you *think* would happen when you turned off all but one of your servers?

[gennylee]

Replying to zooko:

Since you set shares.needed=2, then you have to have at least two storage servers running in order to recover files. What did you *think* would happen when you turned off all but one of your servers?

I set needed=2 in order to recover files when just 2 storage servers are up, so I'm OK with the idea that with 1 only storage server up I cannot recover any file. I'd expect that when all the storage servers are turned on again, i can again retrieve stored files. The problem is that, instead, the system stays in an unrecoverable state.

ERROR: UnrecoverableFileError(no recoverable versions)
"[Failure instance: Traceback: <class 'allmydata.mutable.common.UnrecoverableFileError'>: no recoverable versions"
/usr/lib/python2.7/dist-packages/twisted/internet/base.py:800:runUntilCurrent
/usr/lib/python2.7/dist-packages/foolscap/eventual.py:26:_turn
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:362:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:458:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:545:_runCallbacks
/root/allmydata-tahoe-1.10.0/src/allmydata/mutable/filenode.py:400:_get_version

Thanks

[zooko]

Replying to gennylee:

I'd expect that when all the storage servers are turned on again, i can again retrieve stored files. The problem is that, instead, the system stays in an unrecoverable state.

Yes, I agree that you should be able to recover the files after you turn all the servers back on! Please tell me what the "Welcome Page" says about how many servers are connected, and please tell me the results of running a "deep check" on that file.

Thanks!

[gennylee]

The "Welcome Page" says that two servers are connected: Images: tahoe-grid-status.png The results of running deep check: ​http://pastebin.com/tiMCcEgw Thanks!

[zooko]

Here is the content of ​http://pastebin.com/tiMCcEgw (for the record)

root@storage1:~/allmydata-tahoe-1.10.0/bin# ./tahoe deep-check
ERROR: UnrecoverableFileError(no recoverable versions)
"[Failure instance: Traceback: <class 'allmydata.mutable.common.UnrecoverableFileError'>: no recoverable versions"
/usr/lib/python2.7/dist-packages/twisted/internet/base.py:800:runUntilCurrent
/usr/lib/python2.7/dist-packages/foolscap/eventual.py:26:_turn
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:362:callback
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:458:_startRunCallbacks
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:545:_runCallbacks
/root/allmydata-tahoe-1.10.0/src/allmydata/mutable/filenode.py:400:_get_version

[daira]

Well that's horribly bad error reporting :-(

[daira]

Error reporting issue filed as #2203.