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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2186) DN volume failures on startup are not counted
Date Fri, 22 Jul 2011 07:24:58 GMT
DN volume failures on startup are not counted

                 Key: HDFS-2186
                 URL: https://issues.apache.org/jira/browse/HDFS-2186
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node
            Reporter: Eli Collins
             Fix For: 0.23.0

Volume failures detected on startup are not currently counted/reported as such. Eg if you
have configured 4 volumes, 2 tolerated failures, and you start a DN with two failed volumes
it will come up and report (to the NN) no failed volumes. The DN will still be able to tolerate
2 additional volume failures (ie it's OK with no valid volumes remaining). The intent of the
volume failure toleration config value is that if more than this # of volumes of the total
set of configured volumes have failed the DN should shutdown, therefore volume failures detected
on startup should count against this quota. 

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