pread() fails when cached block locations are no longer valid
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Key: HDFS-445
URL: https://issues.apache.org/jira/browse/HDFS-445
Project: HDFS
Issue Type: Bug
Reporter: Kan Zhang
Assignee: Kan Zhang
when cached block locations are no longer valid (e.g., datanodes restart on
different ports), pread() will fail, whereas normal read() still succeeds
through re-fetching of block locations from namenode (up to a max number of
times).
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