changelog

Changes.md

@@ -2,6 +2,24 @@
 
 [Sidekiq Changes](https://github.com/mperham/sidekiq/blob/master/Changes.md) | [Sidekiq Pro Changes](https://github.com/mperham/sidekiq/blob/master/Pro-Changes.md) | [Sidekiq Enterprise Changes](https://github.com/mperham/sidekiq/blob/master/Ent-Changes.md)
 
+HEAD
+---------
+
+This release has major breaking changes.  Read and test carefully in production.
+
+- **BREAKING CHANGE** Validate proper usage of the `REDIS_PROVIDER`
+  variable.  This variable is meant to hold the name of the environment
+variable which contains your Redis URL, so that you can switch Redis
+providers quickly and easily with a single variable change.  It is not
+meant to hold the actual Redis URL itself.  If you want to manually set
+the Redis URL (not recommended as it implies you have no failover),
+then you may set `REDIS_URL` directly. [#3969]
+- **BREAKING CHANGE** Increase default shutdown timeout from 8 seconds
+  to 25 seconds.  Both Heroku and ECS now use 30 second shutdown timeout
+by default and we want Sidekiq to take advantage of this time.  If you
+have deployment scripts which depend on the old default timeout, use `-t 8` to
+get the old behavior. [#3968]
+
 5.2.2
 ---------