Add tests for ensuring that the DN will start with a few bad data directories
(Part 1 of testing DiskChecker)
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Key: HDFS-2111
URL: https://issues.apache.org/jira/browse/HDFS-2111
Project: Hadoop HDFS
Issue Type: Test
Components: data-node, test
Affects Versions: 0.23.0
Reporter: Harsh J
Assignee: Harsh J
Fix For: 0.23.0
Add tests to ensure that given multiple data dirs, if a single is bad, the DN
should still start up.
This is to check DiskChecker's functionality used in instantiating DataNodes
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