Name node should notify administrator if when struggling with replication
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Key: HADOOP-3323
URL: https://issues.apache.org/jira/browse/HADOOP-3323
Project: Hadoop Core
Issue Type: Improvement
Components: dfs
Reporter: Robert Chansler
Name node performance suffers if either the replication queue is to big, or the
avail space at data nodes is too small. In either case, the administrator
should be notified.
If the situation is really desperate, the name node perhaps should enter safe
mode.
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