A KeyValue is an implementation of the Cell interface. From my experience the Cell API has a similar API but doesn't have some of the methods which KeyValue has and those KeyValue methods are deprecated. Typically you have to use the Cell + CellUtil API to get the same functionality as you have with just KeyValue.
On Sun, Sep 28, 2014 at 8:47 PM, Josh Wills <jwi...@cloudera.com> wrote: > I don't mind conditional compilation on the assumption that we would keep > it scoped to the hbase module; it seems like a lot of changes are coming > down the pike in HBase land. Is Cell a 1:1 mapping of the functions of > KeyValue? > > J > > On Sun, Sep 28, 2014 at 3:18 PM, Micah Whitacre <mkw...@gmail.com> wrote: > > > Dongjin, > > I'm not sure we currently have any plans for setting Crunch up to do > > conditional compilation but if there is enough need it could be explored. > > > > With regard to upgrading to HBase 0.99, is there a specific need for that > > version to be supported? Since HBase treats "odd" releases[1] as > > development, I wouldn't anticipate we would target releasing a version > for > > it. > > > > [1] - http://hbase.apache.org/book/upgrading.html > > > > On Sat, Sep 27, 2014 at 10:33 PM, Dongjin Lee <dongjin.lee...@gmail.com> > > wrote: > > > > > Hello. I am a developer who is working with hadoop 2.5.1. > > > I tried to build crunch 0.11.0 with hbase 0.99.0, but it failed with > > > following messages: > > > > > > [ERROR] > > > > > > > > > /home/dongjinleekr/workspace/hadoop/crunch/crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HFileInputFormat.java:[133,32] > > > error: cannot find symbol > > > [ERROR] > > > location: class KeyValue > > > > > > > > > /home/dongjinleekr/workspace/hadoop/crunch/crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HFileInputFormat.java:[146,33] > > > error: incompatible types > > > [ERROR] required: KeyValue > > > found: Cell > > > > > > > > > /home/dongjinleekr/workspace/hadoop/crunch/crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HFileReaderFactory.java:[60,37] > > > error: incompatible types > > > [ERROR] required: KeyValue > > > found: Cell > > > > > > > > > /home/dongjinleekr/workspace/hadoop/crunch/crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HFileReaderFactory.java:[73,36] > > > error: incompatible types > > > [ERROR] required: KeyValue > > > found: Cell > > > > > > > > > /home/dongjinleekr/workspace/hadoop/crunch/crunch-hbase/src/main/java/org/apache/crunch/io/hbase/HFileUtils.java:[422,28] > > > error: cannot find symbol > > > [INFO] 5 errors > > > > > > I found that this problem occurs by following issue: > > > https://issues.apache.org/jira/browse/HBASE-11805 By this update, > > KeyValue > > > class was replaced with Cell interface. It seems to have been fixed. > > > > > > If there is any problem, I would like to take the work. However, I have > > one > > > question: Is there any plan to apply conditional compilation to Crunch, > > > like Giraph? It uses maven munge plugin to achieve this[^1]. If there > > is, I > > > think munge plugin and symbols should be applied first. > > > > > > Any guidance would be truly appreciated. > > > Thanks in advance. > > > > > > [^1]: I already fixed giraph's compilation error problem, which occurs > > with > > > hadoop 2.5.x. (https://issues.apache.org/jira/browse/GIRAPH-947) > > > > > > -- > > > *Dongjin Lee* > > > > > > > > > *Oracle Server Technologies Group.So interested in massive-scale > machine > > > learning.facebook: www.facebook.com/dongjin.lee.kr > > > <http://www.facebook.com/dongjin.lee.kr>linkedin: > > > kr.linkedin.com/in/dongjinleekr > > > <http://kr.linkedin.com/in/dongjinleekr>github: > > > <http://goog_969573159>github.com/dongjinleekr > > > <http://github.com/dongjinleekr>twitter: www.twitter.com/dongjinleekr > > > <http://www.twitter.com/dongjinleekr>* > > > > > > > > > -- > Director of Data Science > Cloudera <http://www.cloudera.com> > Twitter: @josh_wills <http://twitter.com/josh_wills> >
