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https://issues.apache.org/jira/browse/HIVE-8808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14206983#comment-14206983
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Nick Dimiduk commented on HIVE-8808:
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FYI, this may be changing with HBase 1.0 as we're reworking the way connection
management is handled. I'm behind on my reviews, so I don't know if this
assumption will change.
> 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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