HDFS-6630. Unable to fetch the block information by Browsing the file system on Namenode UI through IE9 ( Contributed by Haohui Mai)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1609629 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5956. Made MR AM not use maxAttempts to determine if the current attempt is the last retry. Contributed by Wangda Tan.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1609649 13f79535-47bb-0310-9956-ffa450edef68