Netty 今天同时发布两个更新版本，分别是：

Netty 4.0.35.Final ：

• Add support for TCP_DEFER_ACCEPT and TCP_QUICKACK (#4951)

• WebSocketHandshaker.finishHandshake could result in recursive channelRead event (#4533) (#4815)

• Enabling SNI, OpenSSL client from netty does not work (#4746) (#4791)

• Certificate failing set in OpenSslServerContext on Linux (#4793)

• Enable SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER when using OpenSslContext (#4816)

• OpenSslContext throws UnsupportedOperationException when Unsafe not available (#4828) (#4843)

• Correctly pass ChannelPromise on to the next ChannelOutboundHandler when use CombinedChannelDuplexHandler (#4838)

• Fix segfault if UnpooledUnsafeHeapByteBuf.getShort(..) is used and UNALGINED access is not possible. (#4845) (#4841)

• Ensure handlerAdded(...) and handlerRemoved(...) is always called from the right thread (#4863)

• Ensure read components can be discarded when COMPOSITE_CUMULATOR is used (#4880)

• Correctly set the alert type depending of the CertificateException (#4885)

• NetUtil can prevent using Netty due to SecurityManager denial (#4936) (#4977)

• Guard against re-entrance in PendingWriteQueue (#4969)

• Change arena to thread cache mapping algorithm to be closer to ideal (#4983)

• Ensure all pending SSL data is written before closing channel during handshake error (#5003)

• Add ! to allowed cookie value chars (#4998)

下载地址：http://dl.bintray.com/netty/downloads/netty-4.0.35.Final.tar.bz2

另外一个版本是 Netty 4.1.0 CR4，改进内容如下：

• DnsNameResolver: makes possible to define additional records in DNS query (#4871)

• DnsNameResolverContext infinite loop (#4771)

• HTTP/2 stream removed from map before onStreamClosed called (#4888)

• Add support for directly decoding/encoding DNS PTR Records (#4912)

• EPOLL ET AutoRead (#4919)

• HTTP/2 DefaultHttp2Connection NPE (#4933)

• Netty 4.1.0.CR1: DNS resolver accepts invalid FQDN with label length > 63 octet (#4935)

• Netty 4.1.0.CR1: DNS resolver do not treat non-ASCII characters correctly (#4937)

• Fix potential infinite loop when resolving CNAME records (#4946)

• HTTP/2 DefaultHttp2ConnectionEncoder data frame size incorrect if error (#4965)

详情请看 https://github.com/netty/netty/issues?q=milestone%3A4.1.0.CR4+is%3Aclosed