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https://issues.apache.org/jira/browse/HDFS-6221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee resolved HDFS-6221.
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Resolution: Not A Problem
> Webhdfs should recover from dead DNs
> ------------------------------------
>
> Key: HDFS-6221
> URL: https://issues.apache.org/jira/browse/HDFS-6221
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, webhdfs
> Affects Versions: 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
>
> We've repeatedly observed the jetty acceptor thread silently dying in the
> DNs. The webhdfs servlet may also "disappear" and jetty returns non-json
> 404s.
> One approach to make webhdfs more resilient to bad DNs is dfsclient-like
> fetching of block locations to directly access the DNs instead of relying on
> a NN redirect that may repeatedly send the client to the same faulty DN(s).
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