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https://issues.apache.org/jira/browse/HIVE-27596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihua Deng reassigned HIVE-27596:
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Assignee: Zhihua Deng
> Make JdbcInputFormat thread-safe
> --------------------------------
>
> Key: HIVE-27596
> URL: https://issues.apache.org/jira/browse/HIVE-27596
> Project: Hive
> Issue Type: Improvement
> Reporter: Zhihua Deng
> Assignee: Zhihua Deng
> Priority: Major
>
> InputFormat is cached in FetchOperator:
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/FetchOperator.java#L233|https://github.com/ganeshashree/hive/blob/c2fb5827761b99b1270582bd9c41c9ab5a6ab549/ql/src/java/org/apache/hadoop/hive/ql/exec/FetchOperator.java#L233]
> and HiveFileInputFormat:
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/io/HiveInputFormat.java#L391]
> which makes the InputFormat instance is accessible across different sessions,
> so it's better to be stateless to avoid concurrency problem.
>
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