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https://issues.apache.org/jira/browse/HDFS-1250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882747#action_12882747
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Konstantin Shvachko commented on HDFS-1250:
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# Some more candidates, could you please verify and add isAlive() condition if
necessary:
#- commitBlockSynchronization()
#- updatePipeline()
# You used "dead or unknown" twice and "unknown or dead" in one other place.
Would be better to have it consistent.
> Namenode accepts block report from dead datanodes
> -------------------------------------------------
>
> Key: HDFS-1250
> URL: https://issues.apache.org/jira/browse/HDFS-1250
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.20.2, 0.22.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Attachments: HDFS-1250.patch
>
>
> When a datanode heartbeat times out namenode marks it dead. The subsequent
> heartbeat from the datanode is rejected with a command to datanode to
> re-register. However namenode accepts block report from the datanode although
> it is marked dead.
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