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https://issues.apache.org/jira/browse/HDFS-14284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16880692#comment-16880692
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Íñigo Goiri commented on HDFS-14284:
------------------------------------

Anything that can tell me from the client who was the Router that triggered the 
exception is fine.
Both audit and reporting the exception would make it.
Even the client technically knows the Router, so the client could add the 
address of the Namenode (Router in this case) that replied.

> RBF: Log Router identifier when reporting exceptions
> ----------------------------------------------------
>
>                 Key: HDFS-14284
>                 URL: https://issues.apache.org/jira/browse/HDFS-14284
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Íñigo Goiri
>            Assignee: hemanthboyina
>            Priority: Major
>
> The typical setup is to use multiple Routers through 
> ConfiguredFailoverProxyProvider.
> In a regular HA Namenode setup, it is easy to know which NN was used.
> However, in RBF, any Router can be the one reporting the exception and it is 
> hard to know which was the one.
> We should have a way to identify which Router/Namenode was the one triggering 
> the exception.
> This would also apply with Observer Namenodes.



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