The DN should stop running it's background threads fail
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Key: HDFS-2953
URL: https://issues.apache.org/jira/browse/HDFS-2953
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node
Affects Versions: 1.0.0, 0.23.0
Reporter: Eli Collins
The DN will currently will startup and run if one of its background threads (eg
the block scanner, async disk service) fails while trying to start. Which in
this cases gives you a running DN w/o a block scanner. The DN should fail to
start if any of its necessary background threads (eg not xfer threads) fail to
start (or fail later on during execution).
In trunk this should be per block pool, ie if one block pool can start but
another cannot we should probably allow the DN to run with the block pools that
can start.
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