John Zhuge reassigned HDFS-11303:

    Assignee: John Zhuge  (was: Chen Zhang)

> 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: John Zhuge
>         Attachments: HDFS-11303-001.patch, HDFS-11303-001.patch, 
> HDFS-11303-002.patch, HDFS-11303-002.patch, HDFS-11303.003.patch, 
> HDFS-11303.004.patch, HDFS-11303.005.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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