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https://issues.apache.org/jira/browse/HDFS-12318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16246143#comment-16246143
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John Zhuge commented on HDFS-12318:
-----------------------------------

Backported to branch-2, branch-2.9, and branch-2.8. Unfortunately not clean 
backport for branch-2.7, skip it [~vinayrpet]?

> Fix IOException condition for openInfo in DFSInputStream
> --------------------------------------------------------
>
>                 Key: HDFS-12318
>                 URL: https://issues.apache.org/jira/browse/HDFS-12318
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 3.0.0-beta1
>            Reporter: legend
>            Assignee: legend
>             Fix For: 3.0.0-beta1
>
>         Attachments: HDFS-12318.001.patch, HDFS-12318.002.patch, 
> HDFS-12318.003.patch, HDFS-12318.patch
>
>
> when retriesForLastBlockLength == 0 and lastBlockBeingWrittenLength != -1, 
> "openInfo" successfully obtains the last blcok locations, and the function 
> still throws IOException.



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