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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13738) DiskChecker should perform some file IO
Date Wed, 19 Oct 2016 23:37:58 GMT
Arpit Agarwal created HADOOP-13738:
--------------------------------------

             Summary: DiskChecker should perform some file IO
                 Key: HADOOP-13738
                 URL: https://issues.apache.org/jira/browse/HADOOP-13738
             Project: Hadoop Common
          Issue Type: Improvement
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


DiskChecker can fail to detect total disk/controller failures indefinitely. We have seen this
in real clusters. DiskChecker performs simple permissions-based checks on directories which
do not guarantee that any disk IO will be attempted.

A simple improvement is to write some data and flush it to the disk.



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