FAQ
Federation: Datanode command to refresh namenode list at the datanode.
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Key: HDFS-1649
URL: https://issues.apache.org/jira/browse/HDFS-1649
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: Federation Branch
Reporter: Jitendra Nath Pandey
Assignee: Jitendra Nath Pandey
Fix For: Federation Branch


When a namenode is added to or removed from a cluster, we need a way to refresh the datanodes:
1. Datanode should load new configuration.
2. Compares the namenode list it has with that of new configuration. If a namenode is deleted, then corresponding
BPOfferService thread is shutdown. If a new namenode is added, a BPOfferService thread is started to service the new
namenode.

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postedFeb 25, '11 at 12:52a
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