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https://issues.apache.org/jira/browse/HADOOP-1224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12493606
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Enis Soztutar commented on HADOOP-1224:
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The confusing thing here, IMO, is that the admin status of the datanode, can be
either NORMAL, DECOMMISIONED or DECOMMISSION_IN_PROGRESS, and if the admin
state is normal, it can be either dead or "not dead". So a data node, from the
perspective of the end user, can be in one of the four states : live, dead,
decommissioned or decommission_in_progress. Thus isDatanodeDead() =/= !
isDatanodeLive().
> "Browse the filesystem" link pointing to a dead data-node
> ---------------------------------------------------------
>
> Key: HADOOP-1224
> URL: https://issues.apache.org/jira/browse/HADOOP-1224
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.12.3
> Reporter: Konstantin Shvachko
> Fix For: 0.13.0
>
> Attachments: DFSBrowsingDeadNode_v1.0.patch,
> DFSBrowsingDeadNode_v1.1.patch
>
>
> On the NameNode status web page "Browse the filesystem" link can point to a
> dead data-node.
> The reason for that is that FSNamesystem.randomDataNode() selects a random
> node from the
> list of all nodes rather then selecting among alive nodes only.
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