13 Jun 2015 - Patrick Wendell announced Apache Spark 1.4 on a Databricks blog. Spark 1.4 introduces SparkR, an R API targeted towards data scientists. It also evolves Sparks DataFrame API with a large number of new features. Sparks ML pipelines API first introduced in Spark 1.3 graduates from an alpha component, writes Wendell. Finally, Spark Streaming and Core add visualization and monitoring to aid in production debugging. Patrick Wendell will write more on his blog about Spark 1.4 in the coming weeks, he promises.