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https://issues.apache.org/jira/browse/HIVE-16060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15889244#comment-15889244
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Xuefu Zhang commented on HIVE-16060:
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+1
> GenericUDTFJSONTuple's json cache could overgrow beyond its limit
> -----------------------------------------------------------------
>
> Key: HIVE-16060
> URL: https://issues.apache.org/jira/browse/HIVE-16060
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Reporter: Chao Sun
> Assignee: Chao Sun
> Attachments: HIVE-16060.1.patch, image.png
>
>
> At the moment the [cache
> object|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDTFJSONTuple.java#L96]
> used in {{GenericUDTFJSONTuple}} is a static linked hashmap that is not
> thread-safe. In the case of HoS it may be accessed concurrently and has race
> conditions. In particular, its size may overgrow even though the limit is 32.
> This can be observed from the attached image.
> An easy way to fix it is to make it non-static.
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