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https://issues.apache.org/jira/browse/HDFS-11303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wei-Chiu Chuang updated HDFS-11303:
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Attachment: HDFS-11303.003.patch
> 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, HDFS-11303-001.patch,
> HDFS-11303-002.patch, HDFS-11303-002.patch, HDFS-11303.003.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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