API Changes
- reflection: accept interface instead of grpc.Server struct in Register() (#4340)
- resolver: add error return value from ClientConn.UpdateState (#4270)
Behavior Changes
- client: do not poll name resolver when errors or bad updates are reported (#4270)
- transport: InTapHandle may return RPC status errors; no longer RST_STREAMs (#4365)
New Features
- client: propagate connection error causes to RPC status (#4311, #4316)
- xds: support inline RDS resource from LDS response (#4299)
- xds: server side support is now experimentally available
- server: add ForceServerCodec() to set a custom encoding.Codec on the server (#4205)
- Special Thanks: @ash2k
Performance Improvements
- metadata: reduce memory footprint in FromOutgoingContext (#4360)
- Special Thanks: @irfansharif
Bug Fixes
- xds/balancergroup: fix rare memory leak after closing ClientConn (#4308)