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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12102) VolumeScanner throttle dropped (fast scan enabled) when there is a corrupt block
Date Thu, 31 Aug 2017 22:18:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16149706#comment-16149706
] 

Junping Du commented on HDFS-12102:
-----------------------------------

Drop 2.8.2 in fix version given patch haven't been committed.

> VolumeScanner throttle dropped (fast scan enabled) when there is a corrupt block
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-12102
>                 URL: https://issues.apache.org/jira/browse/HDFS-12102
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, hdfs
>    Affects Versions: 2.8.2
>            Reporter: Ashwin Ramesh
>            Assignee: Ashwin Ramesh
>            Priority: Minor
>         Attachments: HDFS-12102-001.patch, HDFS-12102-002.patch, HDFS-12102-003.patch
>
>
> When the Volume scanner sees a corrupt block, it restarts the scan and scans the blocks
at much faster rate with a negligible scan period. This is so that it doesn't take 3 weeks
to report blocks since a corrupt block means increased likelihood that there are more corrupt
blocks.



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