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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-445) pread() fails when cached block locations are no longer valid
Date Wed, 15 Jul 2009 15:48:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731520#action_12731520
] 

Hudson commented on HDFS-445:
-----------------------------

Integrated in Hadoop-Hdfs-trunk #23 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-Hdfs-trunk/23/])
    . pread() does not pick up changes to block locations. (Kan Zhang via rangadi)


> pread() fails when cached block locations are no longer valid
> -------------------------------------------------------------
>
>                 Key: HDFS-445
>                 URL: https://issues.apache.org/jira/browse/HDFS-445
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Kan Zhang
>            Assignee: Kan Zhang
>             Fix For: 0.21.0
>
>         Attachments: 445-06.patch, 445-08.patch
>
>
> when cached block locations are no longer valid (e.g., datanodes restart on different
ports), pread() will fail, whereas normal read() still succeeds through re-fetching of block
locations from namenode (up to a max number of times). 

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