What's New in CDH 5.0.x

• HBASE-10436- Restore RegionServer lists removed from HBase 0.96.0 JMX.

  Many of the metrics exposed in CDH 4/0.94 were removed with the refactorization of metrics in CDH 5/0.96. This patch restores the availability of the lists of live and dead RegionServers. In 0.94 this was a large nested structure as shown below, which included the RegionServer lists and metrics from each region.

  {
      "name" : "hadoop:service=Master,name=Master",
      "modelerType" : "org.apache.hadoop.hbase.master.MXBeanImpl",
      "ZookeeperQuorum" : "localhost:2181",
  ....
      "RegionsInTransition" : [ ],
        "RegionServers" : [ {
          "key" : "localhost,48346,1390857257246",
          "value" : {
            "load" : 2,
  .... 

  CDH 5 Beta 1 and Beta 2 did not contain this list; they only displayed counts of the number of live and dead RegionServers. As of CDH 5.0.0, this list is now presented in a semi-colon separated field as follows:

  {
      "name" : "Hadoop:service=HBase,name=Master,sub=Server",
      "modelerType" : "Master,sub=Server",
      "tag.Context" : "master",
      "tag.liveRegionServers" : "localhost,56196,1391992019130",
      "tag.deadRegionServers" :
      "localhost,40010,1391035309673;localhost,41408,1391990380724;localhost,38682,1390950017735",
      ...
  }

• Assorted usability and compatibility improvements as well as improvements to exporting snapshots.

• The HBase Sink now supports coalescing multiple Increment RPCs into one (FLUME-2338).

• File Channel Write timeout has been removed and the configuration parameter is now ignored (FLUME-2307).
• Syslog UDP source can now accept larger messages (FLUME-2130).
• AsyncHBase Sink is now fully functional (FLUME-2334).
• Use standard lookup to find queue/topic in JMS Source (FLUME-2311).

• Deadlock fixed in Dataset sink (FLUME-2320).
• FileChannel Dual Checkpoint Backup Thread is now released on application stop (FLUME-2328).
• Spool Dir source now checks interrupt flag before writing to channel (FLUME-2283).
• Morphline sink increments eventDrainAttemptCount when it takes event from channel (FLUME-2323).
• Bucketwriter now permanently closed only on idle and roll timeouts (FLUME-2325).
• BucketWriter#close now cancels idleFuture (FLUME-2305).

<fs name="archive-files">
<move source="hdfs://namenode/output/*"
target="hdfs://namenode/archive" />
<ok to="next"/>
<error to="fail"/>
</fs>