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From "Manoj Govindassamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11109) ViewFileSystem Df command should work even when the backing NameServices are down
Date Fri, 04 Nov 2016 21:53:58 GMT
Manoj Govindassamy created HDFS-11109:
-----------------------------------------

             Summary: ViewFileSystem Df command should work even when the backing NameServices
are down
                 Key: HDFS-11109
                 URL: https://issues.apache.org/jira/browse/HDFS-11109
             Project: Hadoop HDFS
          Issue Type: Task
    Affects Versions: 3.0.0-alpha1
            Reporter: Manoj Govindassamy
            Assignee: Manoj Govindassamy


With HDFS-11058, Df command will work well with ViewFileSystem. federated cluster can be backed
up several NameServers, with each managing their own NameSpaces. Even when some of the NameServers
are down, the Federated cluster will continue to work well for the NameServers that are alive.


But {{hadoop fs -df}} command when run against the Federated cluster expects all the backing
NameServers to be up and running. Else, the command errors out with exception. 

Would be preferable to have the federated cluster commands highly available to match the NameSpace
partition availability. 

{noformat}
#hadoop fs -df -h /
df: Call From manoj-mbp.local/172.16.3.66 to localhost:52001 failed on connection exception:
java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
{noformat}



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