Arpit Agarwal commented on HDFS-13248:

I'm not in favor of doing of modifying the caller context because the context 
string should be opaque to HDFS. Also the logged caller context strings will be 
incorrect if the target NN is running an older version.

> RBF: Namenode need to choose block location for the client
> ----------------------------------------------------------
>                 Key: HDFS-13248
>                 URL: https://issues.apache.org/jira/browse/HDFS-13248
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Weiwei Wu
>            Assignee: Íñigo Goiri
>            Priority: Major
>         Attachments: HDFS-13248.000.patch, HDFS-13248.001.patch, 
> clientMachine-call-path.jpeg, debug-info-1.jpeg, debug-info-2.jpeg
> When execute a put operation via router, the NameNode will choose block 
> location for the router, not for the real client. This will affect the file's 
> locality.
> I think on both NameNode and Router, we should add a new addBlock method, or 
> add a parameter for the current addBlock method, to pass the real client 
> information.

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