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https://issues.apache.org/jira/browse/HDFS-1879?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matt Foley updated HDFS-1879:
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Affects Version/s: 0.20.204.0
Since HDFS-1541 was committed to 0.20-security in time for 0.20.204 release,
this bug should also be fixed in 0.20-security.
> disambiguate "datanode dead" vs "datanode heartbeat expired"
> ------------------------------------------------------------
>
> Key: HDFS-1879
> URL: https://issues.apache.org/jira/browse/HDFS-1879
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.20.204.0, 0.23.0
> Reporter: Matt Foley
> Priority: Minor
>
> HDFS-1541 changed FSNamesystem.heartbeatCheck() so it would not call
> removeDatanode() while the name system is in Safe Mode. However, calls to
> FSNamesystem.isDatanodeDead() still show datanodes as dead if their heartbeat
> is expired, so the Namenode status web page is not consistent with the intent
> of HDFS-1541.
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