DN volume failures on startup are not counted
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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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