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From "Rakesh R (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-7686) Re-add rapid rescan of possibly corrupt block feature to the block scanner
Date Thu, 14 Jul 2016 18:16:21 GMT

     [ https://issues.apache.org/jira/browse/HDFS-7686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rakesh R updated HDFS-7686:
---------------------------
    Assignee: Colin P. McCabe  (was: Rakesh R)

> Re-add rapid rescan of possibly corrupt block feature to the block scanner
> --------------------------------------------------------------------------
>
>                 Key: HDFS-7686
>                 URL: https://issues.apache.org/jira/browse/HDFS-7686
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Rushabh S Shah
>            Assignee: Colin P. McCabe
>            Priority: Blocker
>             Fix For: 2.7.0
>
>         Attachments: HDFS-7686.002.patch, HDFS-7686.003.patch, HDFS-7686.004.patch
>
>
> When doing a transferTo (aka sendfile operation) from the DataNode to a client, we may
hit an I/O error from the disk.  If we believe this is the case, we should be able to tell
the block scanner to rescan that block soon.  The feature was originally implemented in HDFS-7548
but was removed by HDFS-7430.  We should re-add it.



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