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From "Chen Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11303) Hedged read might hang infinitely if read data from all DN failed
Date Mon, 16 Jan 2017 15:21:26 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15824141#comment-15824141
] 

Chen Zhang commented on HDFS-11303:
-----------------------------------

Hi Andrew,

I’m a newbie to apache community, HDFS-11303 is the first issue I've submitted
In last week, I received a mail said you updated this issue, thanks a lot for your attention
on this issue!
But the issue seems been frozen to me, I can’t do any operation on it now, could you help
point out what’s the status of this issue now, and what should I do next?

Thanks a lot

Best
Chen




> Hedged read might hang infinitely if read data from all DN failed 
> ------------------------------------------------------------------
>
>                 Key: HDFS-11303
>                 URL: https://issues.apache.org/jira/browse/HDFS-11303
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>    Affects Versions: 3.0.0-alpha1
>            Reporter: Chen Zhang
>            Assignee: Chen Zhang
>         Attachments: HDFS-11303-001.patch
>
>
> Hedged read will read from a DN first, if timeout, then read other DNs simultaneously.
> If read all DN failed, this bug will cause the future-list not empty(the first timeout
request left in list), and hang in the loop infinitely



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