HDFS-1842. Handle editlog opcode conflict with 0.20.203 during upgrade, by throwing an error to indicate the editlog needs to be empty. Contributed by Suresh Srinivas.



git-svn-id: https://svn.apache.org/repos/asf/hadoop/hdfs/trunk@1096846 13f79535-47bb-0310-9956-ffa450edef68
7 files changed