Netty 4.0 发布第 6 个 RC 版本，该版本值得关注的改进有：
SslHandlerandJZlibEncodernow works correctly. (#1475 and #1471)- Android compatibility issues has been fixes. (#1451 and #1472)
voidPromise()now works correctly. (#1448)SimpleChannelInboundHandlernow releases the handled message by default. You can specify a boolean constructor parameter to revert to the old behavior (manual release). Note that other handler adapters do not release messages automatically. (#1446)- Making a connection attempt in NIO transport causes an
IllegalStateException(#1467) - Various SPDY improvements from the folks at Twitter (#1456, #1463, #1476)
- Less garbage production and efficiency fixes in SCTP transport (#1457)
完整列表请看 here