Can we release scala 2.12 support in central maven repository

[billyean]

Currently I only see scala 2.11 support for mleap-xgboost-spark and mleap-xgboost-runtime in central maven repository, can you add release for scala 2.12, spark 2.4.5 has to use scala2.12

[lucagiovagnoli]

Hey billyean, I've been having a look at this today

Unfortunately it's not so easy. A package on which we depend (xgboost, see https://github.com/combust/mleap/blob/master/project/Dependencies.scala#L70) is not published for 2.12

But on the plus side, it seems that xgboost cross publishes for scala 2.12 starting from version 1.0.0 (https://mvnrepository.com/artifact/ml.dmlc/xgboost4j_2.12/1.0.0)

[lucagiovagnoli]

I'm trying to tackle that in #708

[billyean]

thank you for update @lucagiovagnoli

[nicodv]

+1 for this.

@lucagiovagnoli , maybe a good idea to separate the 2 goals of the PR? I'd be very interested in the xgboost upgrade.

[tovbinm]

+1

[lucagiovagnoli]

Hi everyone, sorry about the delay, I've been busy with some urgent internal work. I should get back to this by this week, hopefully today

[lucagiovagnoli]

+1 for this.

@lucagiovagnoli , maybe a good idea to separate the 2 goals of the PR? I'd be very interested in the xgboost upgrade.

Yes, in that PR I'm only upgrading xgboost 1.0.0

[nicodv]

In case you're considering moving to a version beyond 1.0.0 (e.g. 1.1.1), it's available following these instructions: dmlc/xgboost#6081 (comment)

[lucagiovagnoli]

Found some issues with 1.1.1, there's some code out here: #718 but I probably won't have time to dig deeper