HeartSaVioR commented on issue #27872: [SPARK-31115][SQL] Detect known Janino bug janino-compiler/janino#113 and apply workaround automatically as a fail-back via avoid using switch statement in generated code URL: https://github.com/apache/spark/pull/27872#issuecomment-601064756 Looks like Janino maintainer explicitly mentioned 3.0.x line is deprecated in Janino changelog. > Version 3.0.16, 2020-03-18 (the 3.0.x line is deprecated) Upgrading Janino to 3.0.16 in Spark 2.4.x wouldn't be any issue as I expect only few of new Spark 2.4.x releases, but for Spark 3.0.0 we expect many further bugfix releases which looks to me that @maropu voice is valid. I'm not sure there's some policy on upgrading dependency based on semver - like upgrading minor version of dependency in bugfix version, but if that's considered as a bad practice in community, we may be better to avoid deprecated version line. Let's collect more voices here.
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