Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/17819
@viirya Oh, I am not saying the compatibility against old version scala
application. What I say is about new version `Bucketizer`, when spark user use
java language(not scala language), call new added API (such as
`setInputSplits`), it cannot work. i.e, the new api isn't java-compatible. for
example:
```
public class JavaBucketizerExample {
public static void main(String[] args) {
Bucketizer bucketizer = new Bucketizer().setInputCols(new String[]
{"features", "features2"});
...
}
}
```
The above java program (Note not scala program) do not work. It cannot even
pass compiling.
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