Netty 4.0.33 发布，此版本包括 60+ 改进：bug 修复，性能改进和新特性。
主要改进：
Fix race-condition when allocate from multiple-thread (#4388) (#4198)
OpenSslServerContext reinitializes the provided TrustManagerFactory with the key cert chain (#4387) (#4355)
Improve size calculation of messages when written from outside the EventLoop (#4380) (#4363)
Always return a real slice even when the length is 0 (#4368)
Fix possible assert error in GlobalEventExecutor (#4367) (#4357)
Correctly handle bitshifting if system does not support unaligned access (#4366)
Add *UnsafeHeapByteBuf for improve performance on systems with sun.misc.Unsafe (#4361)
Allow to disable reference count checks on every access of the ByteBuf (#4344)
A number of toString() methods on classes that implement ByteBufHolder can throw IllegalReferenceCountException (#4327)
Forward decoded messages more frequently (#4322) (#4284)
Ensure pending tasks are run when EmbeddedChannel.close(...) (#4322) (#4284
Implement SSLSession.invalidate() and isValid() for OpenSSLEngine (#4307)
Add support for server-side renegotiation when using OpenSslEngine (#4304)
Correctly reset markers for all allocations when using PooledByteBufAllocator(#4278)
Netty 提供异步的、事件驱动的网络应用程序框架和工具，用以快速开发高性能、高可靠性的网络服务器和客户端程序。
软件详情：https://github.com/netty/netty/issues?q=milestone%3A4.0.33.Final+is%3Aclosed
下载地址：http://netty.io/downloads.html
来自:开源中国社区
