Chao Sun created HIVE-16060:
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Summary: GenericUDTFJSONTuple's HashCache could overgrown
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
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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