If the include hosts list contains host name, after restarting namenode,
datanodes registrant is denied
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Key: HDFS-2086
URL: https://issues.apache.org/jira/browse/HDFS-2086
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Tanping Wang
As the tile describes the problem: if the include host list contains host
name, after restarting namenodes, the datanodes registrant is denied by
namenodes. This is because after namenode is restarted, the still alive data
node will try to register itself with the namenode and it identifies itself
with its *IP address*. However, namenode only allows all the hosts in its
hosts list to registrant and all of them are hostnames. So namenode would deny
the datanode registration.
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