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From "Yongjun Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12813) RequestHedgingProxyProvider can hide Exception thrown from the Namenode for proxy size of 1
Date Sat, 19 May 2018 18:34:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16481730#comment-16481730
] 

Yongjun Zhang commented on HDFS-12813:
--------------------------------------

Thanks you guys for the work here, I cherry-picked it to branch-3.0 which is currently for
3.0.3.


> RequestHedgingProxyProvider can hide Exception thrown from the Namenode for proxy size
of 1
> -------------------------------------------------------------------------------------------
>
>                 Key: HDFS-12813
>                 URL: https://issues.apache.org/jira/browse/HDFS-12813
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>            Reporter: Mukul Kumar Singh
>            Assignee: Mukul Kumar Singh
>            Priority: Major
>             Fix For: 3.1.0, 2.10.0, 3.0.3
>
>         Attachments: HDFS-12813.001.patch, HDFS-12813.002.patch, HDFS-12813.003.patch,
HDFS-12813.004.patch
>
>
> HDFS-11395 fixed the problem where the MultiException thrown by RequestHedgingProxyProvider
was hidden. However when the target proxy size is 1, then unwrapping is not done for the InvocationTargetException.
for target proxy size of 1, the unwrapping should be done till first level where as for multiple
proxy size, it should be done at 2 levels.



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