New Features

• xdsclient: log node ID with verbosity INFO (#5860)
• ringhash: impose cap on max_ring_size to reduce possibility of OOMs (#5801)

Behavior Changes

• client: return an error from Dial if an empty target is passed and no custom dialer is present; the ClientConn would otherwise be unable to connect and perform RPCs (#5732)
  • Special Thanks: @huangchong94

Bug Fixes

• transport (net/http server handler): respond to bad HTTP requests with status 400 (Bad Request) instead of 500 (Internal Server Error). (#5804)
  • Special Thanks: @sjbarag
• transport: Fixed closing a closed channel panic in handlePing (#5854)
• server: fix ChainUnaryInterceptor and ChainStreamInterceptor to allow retrying handlers (#5666)
  • Special Thanks: @yiminc
• transport: ensure value of :authority header matches server name used in TLS handshake when the latter is overridden by the name resolver (#5748)
  • Special Thanks: @holdno

Documentation

• examples: add an example to illustrate the usage of stats handler (#5657)
  • Special Thanks: @Yash-Handa
• examples: add new example to show updating metadata in interceptors (#5788)
  • Special Thanks: @richzw