I know many of you are trying out Hadoop 2.x. Just FYI for those to save time if they hit the following issue when they are building directly off the branch.
pig joins (replication, skewed and merge joins) are broken with a recent checkin - HADOOP-9877. For details refer https://issues.apache.org/jira/browse/HADOOP-9912<https://issues.apache.org/jira/browse/HADOOP-9912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756934#comment-13756934> . It is still under discussion.
