HADOOP-9956. RPC listener inefficiently assigns connections to readers (daryn)


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1541742 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10091. Job with a har archive as input fails on 0.23. Contributed by Jason Dere and Jason Lowe


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1541758 13f79535-47bb-0310-9956-ffa450edef68