Vinayakumar B created HDFS-8090:
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             Summary: Erasure Coding: Add RPC to client-namenode to list all 
ECSchemas loaded in Namenode.
                 Key: HDFS-8090
                 URL: https://issues.apache.org/jira/browse/HDFS-8090
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Vinayakumar B
            Assignee: Vinayakumar B


ECSchemas will be configured and loaded only at the Namenode to avoid conflicts.
Client has to specify one of these schemas during creation of ecZones.
So, add an RPC to ClientProtocol to get all ECSchemas loaded at namenode, so 
that client can choose only any one of these.



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