I've posted an hbase 0.20.4 release candidate 3 here: http://people.apache.org/~stack/hbase-0.20.4-candidate-3/
Should we release this candidate as hbase 0.20.4? It includes some critical fixes and some performance enhancements (See CHANGES.txt or the release notes in the docs [1] for the list of 112 issues addressed by this candidate). Please take it for a test spin if you have a chance. Vote closes Thursday, the 29th of April. Yours, Your HBase Team 1. https://issues.apache.org/jira/browse/HBASE/fixforversion/12314496