Daniel Templeton created HADOOP-12702:
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             Summary: Add an HDFS metrics sink
                 Key: HADOOP-12702
                 URL: https://issues.apache.org/jira/browse/HADOOP-12702
             Project: Hadoop Common
          Issue Type: Improvement
          Components: metrics
    Affects Versions: 2.7.1
            Reporter: Daniel Templeton
            Assignee: Daniel Templeton


We need a metrics2 sink that can write metrics to HDFS. The sink should accept 
as configuration a "directory prefix" and do the following in {{putMetrics()}}

* Get yyyyMMddHH from current timestamp.
* If HDFS dir "dir prefix" + yyyyMMddHH doesn't exist, create it. Close any 
currently open file and create a new file called <hostname>.log in the new 
directory.
* Write metrics to the current log file.
* If a write fails, it should be fatal to the process running the sink.



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