Colin Patrick McCabe created HDFS-5394:
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Summary: fix race conditions in DN caching and uncaching
Key: HDFS-5394
URL: https://issues.apache.org/jira/browse/HDFS-5394
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: HDFS-4949
Reporter: Colin Patrick McCabe
Assignee: Colin Patrick McCabe
The DN needs to handle situations where it is asked to cache the same replica
more than once. (Currently, it can actually do two mmaps and mlocks.) It also
needs to handle the situation where caching a replica is cancelled before said
caching completes.
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