Spark 1.6.1 is a maintenance release containing stability fixes. This release is based on the branch-1.6 maintenance branch of Spark. We *strongly recommend* all 1.6.0 users to upgrade to this release.

Notable fixes include:
 - Workaround for OOM when writing large partitioned tables SPARK-12546
 - Several fixes to the experimental Dataset API - SPARK-12478SPARK-12696SPARK-13101SPARK-12932

The full list of bug fixes is here: http://s.apache.org/spark-1.6.1
http://spark.apache.org/releases/spark-release-1-6-1.html

(note: it can take a few hours for everything to be propagated, so you might get 404 on some download links, but everything should be in maven central already.  If you see any issues with the release notes or webpage *please contact me directly, off-list*)