Daryn Sharp created HDFS-6221:
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Summary: 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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