Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/22179#discussion_r214127809
--- Diff: pom.xml ---
@@ -1770,6 +1770,10 @@
<groupId>org.apache.hive</groupId>
<artifactId>hive-storage-api</artifactId>
</exclusion>
+ <exclusion>
+ <groupId> com.esotericsoftware</groupId>
+ <artifactId>kryo-shaded</artifactId>
--- End diff --
Thank you for pinging me, @srowen . ORC uses Kryo only for writing/reading
one ORC configuration, `orc.kryo.sarg`. The followings are the Spark's code
indirect code path. I guess Kryo provides backward compatibility at lest, but
I'll take a look at this PR today.
- For new ORCFileFormat,
[OrcInputFormat.setSearchArgument](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/orc/OrcFileFormat.scala#L159)
- For old ORCFileFormat,
[SearchArgument.toKryo](https://github.com/apache/spark/blob/master/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcFileFormat.scala#L129)
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