pan3793 commented on code in PR #38596:
URL: https://github.com/apache/spark/pull/38596#discussion_r1018684836


##########
pom.xml:
##########
@@ -928,16 +924,6 @@
         <version>${netty.version}</version>
         <classifier>osx-x86_64</classifier>
       </dependency>
-      <!-- SPARK-38541: Add the explicit dependency on 
`netty-tcnative-classes` because the dependency on
-           `netty-tcnative-classes` is changed to `Optional` in 
[netty](https://github.com/netty/netty/pull/12146).
-           `netty-tcnative-classes` module is mainly used by SSL package in 
`netty-handler`.

Review Comment:
   Netty support openSSL and JDK SSL, to enable openSSL support, 
`netty-tcnative-classes` and [platform native 
libs](https://repo1.maven.org/maven2/io/netty/netty-tcnative-boringssl-static/2.0.54.Final/)
 should be existed in classpath.
   
   Single `netty-tcnative-classes` will cause 
https://github.com/netty/netty/issues/12101
   
   And previous `netty-all`(fat jar) does not include tcnative as well.



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