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https://issues.apache.org/jira/browse/FLINK-14243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16966999#comment-16966999
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Bowen Li edited comment on FLINK-14243 at 11/4/19 8:57 PM:
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We may document that in Flink to inform users though
was (Author: phoenixjiangnan):
We may document that to inform users though
> flink hiveudf needs some check when it is using cache
> -----------------------------------------------------
>
> Key: FLINK-14243
> URL: https://issues.apache.org/jira/browse/FLINK-14243
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Hive, Table SQL / Planner
> Affects Versions: 1.9.0
> Reporter: jackylau
> Priority: Major
> Fix For: 1.10.0
>
> Attachments: Snipaste_2019-10-30_15-34-09.png
>
>
> Flink1.9 brings in hive connector, but it will have some problem when the
> original hive udf using cache. We konw that hive is processed level parallel
> based on jvm, while flink/spark is task level parallel. If flink just calls
> the hive udf, it wll exists thread-safe problem when using cache.
> So it may need check the hive udf code and if it is not thread-safe, and set
> the flink parallize=1
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