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Posted to common-issues@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2014/07/17 18:31:05 UTC

[jira] [Updated] (HADOOP-10855) Allow Text to be read with a known length

     [ https://issues.apache.org/jira/browse/HADOOP-10855?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon updated HADOOP-10855:
---------------------------------

    Attachment: hadoop-10855.txt

Attached patch implements readWithKnownLength(). I also refactored the common code out from the existing read methods to call this new one after deserializing the length. Added a simple new unit test to verify.

> Allow Text to be read with a known length
> -----------------------------------------
>
>                 Key: HADOOP-10855
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10855
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>    Affects Versions: 2.6.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>         Attachments: hadoop-10855.txt
>
>
> For the native task work (MAPREDUCE-2841) it is useful to be able to store strings in a different fashion than the default (varint-prefixed) serialization. We should provide a "read" method in Text which takes an already-known length to support this use case while still providing Text objects back to the user.



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