Finagle 6.36 Release Notes

This is Finagle’s first release only for Java 8 and Scala 2.11. Since the previous release, the team has been focusing on the Netty 4 migration as well as eliminating some technical debt.

Towards Netty 4

The team is firing on all cylinders towards Netty 4 support in Finagle. This milestone brings beta (not yet widely used in production) Netty 4 support to Mux/ThriftMux, HTTP 1.1, and SOCKS5 (proxy).

In the meantime, we’re part way through migrating the MySQL, Memcached, and Redis protocol. Everything is going quite smoothly (except for a couple of shortcuts we had to take with Redis) and we’re super positive about having an experimental Netty 4 support for those protocols in the next release.

Killing Tech Debt

There was a tech debt sprint this milestone where we fixed plenty of broken windows. To mention a few:

• replace our own version of NoStacktrace with the Scala version
• replace our own fork of JSR166e with the JDK8 version
• clean up duplicated stats: closechans, closed, and load
• finagle-zipkin is now split into two packages: finagle-zipkin (implementation) and finagle-zipkin-core (core data types and interfaces)

Side Effects are Side Effects

There is one runtime change we think it’s worth highlighting here. We changed the behaviour of .onSuccess/.onFailure combinators so that they don’t fail a request if the passed function throws an exception. Please, consider refactoring if your application has been relying on that behaviour.

Changelog

• Finagle 6.36
• Util 6.35
• Scrooge 4.8
• TwitterServer 1.21
• Ostrich 9.19 (no changes, only dependency bump)