Hi Developers, In the next few days we are planning to merge Scala 2.10 support into Spark. For those that haven't been following this, Prashant Sharma has been maintaining the scala-2.10 branch of Spark for several months. This branch is current with master and has been reviewed for merging:
https://github.com/apache/incubator-spark/tree/scala-2.10 Scala 2.10 support is one of the most requested features for Spark - it will be great to get this into Spark 0.9! Please note that *Scala 2.10 is not binary compatible with Scala 2.9*. With that in mind, I wanted to give a few heads-up/requests to developers: If you are developing applications on top of Spark’s master branch, those will need to migrate to Scala 2.10. You may want to download and test the current scala-2.10 branch in order to make sure you will be okay as Spark developments move forward. Of course, you can always stick with the current master commit and be fine (I’ll cut a tag when we do the merge in order to delineate where the version changes). Please open new threads on the dev list to report and discuss any issues. This merge will temporarily drop support for YARN 2.2 on the master branch. This is because the workaround we used was only compiled for Scala 2.9. We are going to come up with a more robust solution to YARN 2.2 support before releasing 0.9. Going forward, we will continue to make maintenance releases on branch-0.8 which will remain compatible with Scala 2.9. For those interested, the primary code changes in this merge are upgrading the akka version, changing the use of Scala 2.9’s ClassManifest construct to Scala 2.10’s ClassTag, and updating the spark shell to work with Scala 2.10's repl. - Patrick
