Tao Jie created HDFS-13219:

             Summary: RBF:Cluster information on Router is not correct when the 
Federation shares datanodes.
                 Key: HDFS-13219
                 URL: https://issues.apache.org/jira/browse/HDFS-13219
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 2.9.0
            Reporter: Tao Jie

Now summary information on Router website aggregates summary of each 
nameservice. However in a typical federation cluster deployment, datanodes are 
shared among nameservices. Consider we have 2 namespaces and 100 datanodes in 
one cluster. 100 datanodes are available for each namespace, but we see 200 
datanodes on the router website. So does other information such as {{Total 
capacity}}, {{Remaining capacity}}.

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