Hadoop HDFS Change Log for HDFS-4949

HDFS-4949 (Unreleased)

  INCOMPATIBLE CHANGES

  NEW FEATURES

  IMPROVEMENTS
    HDFS-5049.  Add JNI mlock support.  (Andrew Wang via Colin Patrick McCabe)

    HDFS-5051.  Propagate cache status information from the DataNode to the
    NameNode  (Andrew Wang via Colin Patrick McCabe)

    HDFS-5052.  Add cacheRequest/uncacheRequest support to NameNode.
    (contributed by Colin Patrick McCabe)

    HDFS-5050.  Add DataNode support for mlock and munlock
    (Andrew Wang via Colin Patrick McCabe)

    HDFS-5141. Add cache status information to datanode heartbeat.
    (Contributed by Andrew Wang)

    HDFS-5121. Add RPCs for creating and manipulating cache pools.
    (Contributed by Colin Patrick McCabe)

    HDFS-5163. Miscellaneous cache pool RPC fixes.  (Contributed by Colin
    Patrick McCabe)

  OPTIMIZATIONS

  BUG FIXES
    HDFS-5169. hdfs.c: translateZCRException: null pointer deref when
    translating some exceptions.  (Contributed by Colin Patrick McCabe)