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Netty 4.1.52.Final released

I am happy to announce the release of netty 4.1.52.Final. This is mainly a bug-fix release but also contains some new features like MQTT 5.0 support.

The most important changes in this release are:

  • Fix ByteBufUtil.getBytes() incorrectly sharing the array in some cases (#10529)
  • Create a stackless ClosedChannelException to reduce overhead when the Channel is closed (#10523)
  • Use all configured nameservers when using DnsNameResolver in all cases (#10503)
  • Expose a LoggingDnsQueryLifeCycleObserverFactory (#10490)
  • Binary search based IpSubnetFilter (#10492)
  • Include TLSv1.3 ciphers as recommented ciphers for HTTP2 (#10480)
  • Correctly limit queries done to resolve unresolved nameservers (#10478)
  • Add whitelist entry to BlockHound config to workaround issue when TLS1.3 is enabled and the SslProvider.JDK is used (#10459)
  • Enable TLS1.3 by default of JDK SSLEngine implementation does by default (#10451)
  • Fix DnsNameResolver may have LEAK ByteBuf after cancelling the returned future (#10448)
  • Making AES_128_GCM_SHA256 have a higher priority over CHACHA20_POLY1305_SHA256 on HTTP2 (#10418)
  • Enable SSL_MODE_ENABLE_FALSE_START if jdkCompatibilityMode is false (#10407)
  • Reduce memory fragmentation caused by PooledByteBufAllocator (#10267)
  • MQTT5 support for netty-codec-mqtt (#10483)

For the details and all changes, please browse our issue tracker for 4.1.52.Final.

Thank You

Every idea and bug-report counts and so we thought it is worth mentioning those who helped in this area. What makes me really proud and happy is that amount of new "first-time contributors" in this release. We <3 all of you :)

Please report an unintended omission.