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