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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7686) Re-add rapid rescan of possibly corrupt block feature to the block scanner
Date Sat, 14 Feb 2015 10:44:18 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321355#comment-14321355
] 

Hudson commented on HDFS-7686:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #838 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/838/])
HDFS-7686. Re-add rapid rescan of possibly corrupt block feature to the block scanner (cmccabe)
(cmccabe: rev 8bb9a5000ed06856abbad268c43ce1d5ad5bdd43)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockScanner.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/VolumeScanner.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockScanner.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
update CHANGES.txt for HDFS-7430, HDFS-7721, HDFS-7686 (cmccabe: rev 19be82cd1614000bb26e5684f763c736ea46ff1a)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt


> 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 Patrick 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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