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https://issues.apache.org/jira/browse/HIVE-8808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14206979#comment-14206979
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Nick Dimiduk commented on HIVE-8808:
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Yes, it looks like our input formats are stateful. We're set up to specify a
config object and that's closed over to provide custom record readers, based on
which mapred API is being implemented.
> HiveInputFormat caching cannot work with all input formats
> ----------------------------------------------------------
>
> Key: HIVE-8808
> URL: https://issues.apache.org/jira/browse/HIVE-8808
> Project: Hive
> Issue Type: Bug
> Reporter: Brock Noland
>
> In {{HiveInputFormat}} we implement instance caching (see
> {{getInputFormatFromCache}}). In HS2, this assumes that InputFormats are
> stateless but I don't think this assumption is true, especially with regards
> to HBase.
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