We are happy to announce the release of the first beta for the upcoming netty version 4.2.0. Everyone using netty 4.1.x should be able to upgrade to 4.2.0.Alpha4 without any API breakage. The only new requirement is JDK8 or later.

We encourage users of netty 4.1.x to try out this alpha release and so provide feedback if any breakage is noticed. This will help us to be aware of any problems early in the release cycle. That said, be aware that this is only an alpha release and so shouldn't be considered for production usage.

Netty 4.2.0 will come with some exciting new features that you can learn more about in the announcement of netty 4.2.0.Alpha1.

The most important changes in this release are:

• Fix SSL session resumption with ClientAuth.OPTIONAL and add tests with session tickets (#14404)
• Fix incorrect cast in NioDomainSocketChannel.parent() (#14409)
• Fix bug where SslHandler may stall after TLSv1.3 handshake with delegate tasks (#14411)
• Log / include the correct error during handshake failure (#14428)
• Update to netty-tcnative 2.0.69.Final (#14422)
• Fix epoll_wait retry loop (#14425)
• Allow MessageToMessageDecoder to take care of reading more data when needed (#14372)

Thank You

Every idea and bug-report counts, and so we thought it is worth mentioning those who helped in this area.

Please report an unintended omission.

• @bryce-anderson
• @chrisvest
• @dsidorov
• @franz1981
• @laosijikaichele
• @normanmaurer
• @yawkat

Beside this we also would like to thank everyone who took the time to test 4.2.0.Alpha* so far.