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From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6110) adding more slow action log in critical write path
Date Mon, 17 Mar 2014 10:26:42 GMT
Liang Xie created HDFS-6110:
-------------------------------

             Summary: adding more slow action log in critical write path
                 Key: HDFS-6110
                 URL: https://issues.apache.org/jira/browse/HDFS-6110
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode
    Affects Versions: 2.3.0, 3.0.0
            Reporter: Liang Xie
            Assignee: Liang Xie


After digging a HBase write spike issue caused by slow buffer io in our cluster, just realize
we'd better to add more abnormal latency warning log in write flow, such that if other guys
hit HLog sync spike, we could know more detail info from HDFS side at the same time.
Patch will be uploaded soon.



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