Name node will exit safe mode w/0 blocks even if data nodes are broken
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Key: HDFS-580
URL: https://issues.apache.org/jira/browse/HDFS-580
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Allen Wittenauer
If one brings up a freshly formatted name node against older data nodes with an
incompatible storage id (such that the datanodes fail with Directory
/mnt/u001/dfs-data is in an inconsistent state: is incompatible with others.),
the name node will still come out of safe mode. Writes will partially
succeed--entries are created, but all are zero length.
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