Tracker cannot find a file even if it is present on the devices
dormando at rydia.net
Wed Feb 27 20:32:58 UTC 2008
First I've heard of this.
Any chance you could send the list (or me privately) the some of the
rows from your database?
SELECT * FROM file WHERE fid = brokenfid;
SELECT * FROM file_on WHERE fid = brokenfid;
maybe what's in domain, devices tables. devices would be more important.
I suspect there might be no file_on rows associated with it, or it's
failing the paths test somehow.
You can try fetching the key with the 'noverify=1' option set and see if
it returns paths (that may not work). By default mogilefs will try a
HEAD request against the storage node for each path, and filter by what
paths actually work. This is even probably a better suggestion to test
than sending me parts of your database.
Dinesh Gadge wrote:
> Hello everybody,
> I am using the ruby mogilefs-client library to interact with my mogilefs
> It has happened on a few occasions that after storing a file with a
> particular key, tracker does not recognize the key, and returns nil on
> where key is the key of that file.
> This is an irreproducible [and hence an annoying :( ] problem [at least
> for me].
> When I checked up, the file had a correct entry in the db, with the
> correct key and devids.
> On checking up the /var/mogdata directory for the corresponding devices,
> the file was present.
> Still, it seems, the tracker is unable to find the file using that key.
> I have tried it with the perl client too, even it gives an 'undef' on
> asking for the file using get_file_data with the corresponding key.
> I have tried 'list_keys' on both ruby and perl client .. and the result
> does not have any entry for the given key.
> My question is .. is this a known issue ?
> or is it something I experienced randomly ? (on more-than-one occasions
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