Your old AWS ParallelCluster stacks will NOT break in 2026
Note: This post is pure google bait designed to help others who run into the same problem. We hope it helps! We had been advising clients to rebuild older ParallelCluster stacks — the ones whose cleanup Lambdas are templated on python3.9 — by mid-2026, ahead of the published Lambda block dates. Those dates have moved. […]