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Date: Thu, 5 Jul 2012 23:36:34 +0000 (UTC)
From: "Colin Patrick McCabe (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Updated] (HDFS-3548) NamenodeFsck.copyBlock fails to create
 a Block Reader
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     [ https://issues.apache.org/jira/browse/HDFS-3548?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Colin Patrick McCabe updated HDFS-3548:
---------------------------------------

    Attachment: HDFS-3548.002.patch

* fix style issues and rebase
                
> NamenodeFsck.copyBlock fails to create a Block Reader
> -----------------------------------------------------
>
>                 Key: HDFS-3548
>                 URL: https://issues.apache.org/jira/browse/HDFS-3548
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.1, 2.0.0-alpha
>            Reporter: Todd Lipcon
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>         Attachments: HDFS-3548.001.patch, HDFS-3548.002.patch
>
>
> NamenodeFsck.copyBlock creates a Socket using {{new Socket()}}, and thus that socket doesn't have an associated Channel. Then, it fails to create a BlockReader since RemoteBlockReader2 needs a socket channel.
> (thanks to Hiroshi Yokoi for reporting)

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