Rip out DistributedUpgrade framework
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Key: HDFS-2686
URL: https://issues.apache.org/jira/browse/HDFS-2686
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node, name-node
Affects Versions: 0.24.0
Reporter: Todd Lipcon
A distributed upgrade framework was introduced long ago in HADOOP-1286 but was
only used twice throughout history, and not since 0.17, where it was considered
buggy (see HADOOP-3677). This is a lot of clutter in our codebase - let's
consider removing it?
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