HDFS-6776. Using distcp to copy data between insecure and secure cluster via webdhfs doesn't work. (yzhangal via tucu)
HADOOP-11077. NPE if hosts not specified in ProxyUsers. (gchanan via tucu)
HADOOP-9989. Bug introduced in HADOOP-9374, which parses the -tokenCacheFile as binary file but set it to the configuration as JSON file. (zxu via tucu)