Thanks Lars for this notice. The discussion on HBASE-5416 is very long. If you want to focus on discussion pertinent to this notice, you can start from here:
https://issues.apache.org/jira/browse/HBASE-5416?focusedCommentId=13584553&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13584553 In HBASE-7920, Move isFamilyEssential(byte[] name) out of Filter interface in 0.94, the revision was made. Cheers On Mon, Feb 25, 2013 at 6:08 PM, lars hofhansl <[email protected]> wrote: > - If you do not implement custom filter you can ignore the rest of this > message. > - If you your custom filters extend FilterBase you can ignore the rest of > this message. > > In 0.94.5 we added a new feature to Filters, which allows certain filters > to avoid loading entire column families if they are not necessary to > evaluation the filter (and the filter indicates that the row/kv should be > filtered). > > In order to do that we added a new method to Filter: > isFamilyEssential(bytep[]). It was pointed out that anybody who implemented > the Filter interface directly instead of extending FilterBase in prior > versions of HBase now has make changes to the implementing class to add an > implementation of isFamilyEssential. > > After some discussion (see HBASE-5416) we decided to remove that method > from Filter and push it instead into FilterBase (even though I was > skeptical about that). > > TL;DR: Custom filters should extend FilterBase. If you implement custom > filter and makes use of isFamilyEssential for HBase 0.94.5 and do so by > implementing Filter directly you will have to change your code in 0.94.6 > and later and extend FilterBase instead to get this functionality. > Just a heads up, it is quite unlikely that anybody will actually run into > this. > > Your 0.94 release manager. > > > -- Lars > >
