Netty 4.1.22.Final 已发布，该版本包含错误修复、性能增强和新功能，建议升级。 主要的变更：
To detect Android, check the VM property rather than the classpath (#7679) Propagate full Unsafe unavailability reason in PlatformDependent (#7684) Use long for http2 ping payload (#7690) Introduce an alternative IdentityCipherSuiteFilter that defaults to supportedCiphers (#7691) Reduce the default number of objects retained by the Recycler per thread (#7701) Bump Conscrypt version to 1.0.0 (#7703) ByteBufUtil to not pool direct memory by default (#7704) NioDatagramChannel invalid usage of internalNioBuffer (#7705) Http2MultiplexCodec now propagates SETTINGS and GOAWAY frames in pipeline (#7711) Correctly handle the case when converting of value fails and return null or default value (#7715) DefaultHeaders / CharSequenceValueConverter should treat boolean consistently (#7720) Get memory address from Unsafe for OpenSSL (#7725) SSL connection not closed properly after handshake failure (#7727) Epoll flush/writabilityChange deadlock (#7730) Fix Snappy decoding of large 2-byte literal lengths and copy offsets (#7731) Ensure we always release the AddressEnvelope when doing DNS queries. (#7734)
有关详细信息和所有变更内容，请浏览 4.1.22.Final 的问题跟踪器。 重要的变更
HTTP2 该版本将 ping 帧的有效载荷类型由 ByteBuf 改为 long，因为这样可以简化事务，并且 RFC 中关于有效负荷的定义一直是 8 字节。 发布说明：http://netty.io/news/2018/02/21/4-1-22-Final.html | 
