details here (see most recent comments for current state of things): https://issues.apache.org/jira/browse/SPARK-25079
my PR for these changes: https://github.com/apache/spark/pull/24266 we're doing this because we need to support arrow 0.12.1: https://issues.apache.org/jira/browse/SPARK-27276 a couple of things: * i won't be switching things over until april 11th or 12th at the earliest. * this change will require a short (~15-20min) downtime to switch over from 3.4 to 3.6. * updating python will impact all active branches, so i will need to backport this pr: https://github.com/apache/spark/pull/24266 question: which other branches should i be applying this change to? definitely master and 2.4... also 2.3? 2.2? thanks in advance, shane -- Shane Knapp UC Berkeley EECS Research / RISELab Staff Technical Lead https://rise.cs.berkeley.edu