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From "Vikram Dixit K (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-6326) Split generation in ORC may generate wrong split boundaries because of unaccounted padded bytes
Date Wed, 19 Feb 2014 22:27:20 GMT

     [ https://issues.apache.org/jira/browse/HIVE-6326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vikram Dixit K updated HIVE-6326:
---------------------------------

    Fix Version/s: 0.13.0

> Split generation in ORC may generate wrong split boundaries because of unaccounted padded
bytes
> -----------------------------------------------------------------------------------------------
>
>                 Key: HIVE-6326
>                 URL: https://issues.apache.org/jira/browse/HIVE-6326
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 0.13.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>              Labels: orcfile
>             Fix For: 0.13.0
>
>         Attachments: HIVE-6326.1.patch, HIVE-6326.2.patch, HIVE-6326.3.patch, HIVE-6326.4.patch
>
>
> HIVE-5091 added padding to ORC files to avoid ORC stripes straddling HDFS blocks. The
length of this padded bytes are not stored in stripe information. OrcInputFormat.getSplits()
uses stripeInformation.getLength() for split computation. stripeInformation.getLength() is
sum of index length, data length and stripe footer length. It does not account for the length
of padded bytes which may result in wrong split boundary.
> The fix for this is to use the offset of next stripe as the length of current stripe
which includes the padded bytes as well.



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