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https://issues.apache.org/jira/browse/HIVE-21193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-21193 started by BELUGA BEHR.
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> Support LZO Compression with CombineHiveInputFormat
> ---------------------------------------------------
>
> Key: HIVE-21193
> URL: https://issues.apache.org/jira/browse/HIVE-21193
> Project: Hive
> Issue Type: Improvement
> Components: Compression
> Affects Versions: 4.0.0, 3.2.0
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Major
> Attachments: HIVE-21193.1.patch
>
>
> In regards to LZO compression with Hive...
> https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LZO
> It does not work out of the box if there are {{.lzo.index}} files present.
> As I understand it, this is because of the default Hive input format
> {{CombineHiveInputFormat}} does not handle this correctly. It does not like
> that there are a mix of data files and some index files, it lumps them
> altogether when making the combined splits and Mappers fail when they try to
> process the {{.lzo.index}} files as data. When using the original
> {{HiveInputFormat}}, it correctly identifies the {{.lzo.index}} files because
> it considers each file individually.
> Allow {{CombineHiveInputFormat}} to short-circuit LZO files and to not
> combine them.
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