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https://issues.apache.org/jira/browse/HDFS-13976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16645401#comment-16645401
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Lukas Majercak commented on HDFS-13976:
---------------------------------------
Ran the tests on branch-2.9 and it seems fine, TestRequestHedgingProxyProvider
passes and everything else seems intact:
!TestRequestHedgingProxyProvider.png!
> Backport HDFS-12813 to branch-2.9
> ---------------------------------
>
> Key: HDFS-13976
> URL: https://issues.apache.org/jira/browse/HDFS-13976
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs, hdfs-client
> Reporter: Lukas Majercak
> Assignee: Lukas Majercak
> Priority: Major
> Fix For: 2.9.2
>
> Attachments: HDFS-12813.branch-2.001.patch,
> HDFS-12813.branch-2.9.001.patch, TestRequestHedgingProxyProvider.png
>
>
> 2.9 also shows the issue from HDFS-12813:
> 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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