I think you've nailed it. I've committed this fix to 1.1.11 and 1.2.3. On Fri, Mar 8, 2013 at 5:59 PM, Boris Yen <yulin...@gmail.com> wrote: > Use the following sstable on our file system as an example. > > rw-rr- 1 byan admin 333 Mar 5 15:26 indexBytes-hd-115-Index.db > rw-rr- 1 byan admin 66305 Mar 5 15:26 indexBytes-tmp-hd-115-Data.db > rw-rr- 1 byan admin 67 Mar 5 15:26 indexBytes-tmp-hd-115-Digest.sha1 > rw-rr- 1 byan admin 1936 Mar 5 15:26 indexBytes-tmp-hd-115-Filter.db > > The reason why we tweak the hashcode and equals methods is that the > Descriptor for indexBytes-hd-115-Index.db and indexBytes-tmp-hd-115-Data.db > are the same. If the Descriptor is used as key in a map and > indexBytes-hd-115-Index.db > get listed first, the C* will consider that the there are four components > for this Descriptor [Digest.sha1, Index.db, Filter.db, Data.db]. In this > case, it is not correct. When removing orphans for sstable, the Descriptor > will be used to create the filename to delete files, that is why C* cannot > find the file to delete. > > Regards, > Boris > > On Sat, Mar 9, 2013 at 12:54 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > >> Thanks, Boris. Can you explain what the cause is, and why tweaking hashCode >> fixes it? >> On Mar 8, 2013 4:17 AM, "Boris Yen" <yulin...@gmail.com> wrote: >> >> > Hi, >> > >> > We have run into this a few times on 1.0.10. It seems this happens when >> > the file-rename after compaction is not completed. We have created a >> patch >> > for this. However, in order to make sure we do not break anything, I was >> > wondering if anyone could help us review the changes to see if this would >> > cause any issue or not. >> > >> > Thanks and Regards, >> > Boris >> > >>
-- Jonathan Ellis Project Chair, Apache Cassandra co-founder, http://www.datastax.com @spyced
