Clean up LeaseManager#changeLease
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Key: HDFS-2875
URL: https://issues.apache.org/jira/browse/HDFS-2875
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.24.0
Reporter: Aaron T. Myers
Priority: Minor
The code for {{LeaseManager#changeLease}} and the associated
{{FSNamesystem#unprotectedChangeLease}} is very fragile, and can be improved in
several ways.
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