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https://issues.apache.org/jira/browse/HDFS-14284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16880596#comment-16880596
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Ayush Saxena commented on HDFS-14284:
-------------------------------------

IIUC Don't we unwrap every exception in Router Before throwing it to the 
client, We have some unwrap mechanism to change ns path to mount level path for 
user and RE to IOE.

Isn't this just require to just add the Router Identifier too into the 
exception when we process the exception in the same method?

Or something else is intended?

> 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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