Add new access method to a copy of a block's replica
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Key: HDFS-680
URL: https://issues.apache.org/jira/browse/HDFS-680
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 0.21.0
Reporter: Konstantin Boudnik
Assignee: Konstantin Boudnik
Fix For: 0.21.0
Sometimes tests (and perhaps other client applications) might need an access to
the state of a block's replica.
Currently it is accessible through {{FSDataset}} member of {{DataNode}} class.
However, {{FSDataset}} is an internal matter of {{DataNode}} and shouldn't be
available externally.
This JIRA will provide new getter method which will be returning a copy of a
block's replica instead of a reference to an actual replica.
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