The SparkR support PR is finished, along with integration testing, however Shane has requested that the integration testing not be enabled until after the 2.4 release because it requires the OS updates he wants to test *after* the release.
The integration testing can be run locally, and so the question at hand is: would the PMC be willing to consider inclusion of the SparkR for 2.4, based on local verification of the testing? The PySpark PR was merged under similar circumstances: the testing was verified locally and the PR was merged before the testing was enabled for jenkins. Cheers, Erik