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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3778) seek(long) in DFSInputStream should catch socket exception for retry later
Date Sat, 19 Jul 2008 22:31:31 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615056#action_12615056
] 

stack commented on HADOOP-3778:
-------------------------------

I added him as a contributor under hbase with user name LN.  Does that work for you Raghu?
(https://issues.apache.org/jira/secure/ViewProfile.jspa?name=ln%40webcate.net)

> seek(long) in DFSInputStream should catch socket exception for retry later
> --------------------------------------------------------------------------
>
>                 Key: HADOOP-3778
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3778
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.16.0
>            Reporter: LN
>            Priority: Minor
>             Fix For: 0.18.0
>
>         Attachments: HADOOP-3778.patch, HADOOP-3778.patch
>
>
> HADOOP-2346 introduced data read/write timeout. when data stream borken, DFSClient will
retry in read/write methods, but no such mechanism found when seek(long) calling blockReader.skip(diff)
(DFSClient.java #1582), will let IOException throw to application.  i met NPE when using MapFile
in hbase.
> i'm supposing in the seek(long) method, let done be 'false' will causing retry (via 'blockEnd
= -1'), a patch will attached later for review.

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