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From "Kan Zhang (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-445) pread() fails when cached block locations are no longer valid
Date Thu, 02 Jul 2009 20:39:47 GMT

     [ https://issues.apache.org/jira/browse/HDFS-445?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kan Zhang updated HDFS-445:
---------------------------

    Status: Patch Available  (was: Open)

> pread() fails when cached block locations are no longer valid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
>         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 when cached block locations are no longer valid (e.g., datanodes restart on different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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