Release 1.39.0

Behavior Changes

• csds: return empty response if xds client is not set (#4505)
• metadata: convert keys to lowercase in FromContext() (#4416)

New Features

• xds: add GetServiceInfo to GRPCServer (#4507)
  • Special Thanks: @amenzhinsky
• xds: add test-only injection of xds config to client and server (#4476)
• server: allow PreparedMsgs to work for server streams (#3480)
  • Special Thanks: @eafzali

Performance Improvements

• transport: remove decodeState from client & server to reduce allocations (#4423)
  • Special Thanks: @JNProtzman

Bug Fixes

• server: return UNIMPLEMENTED on receipt of malformed method name (#4464)
• xds/rds: use 100 as default weighted cluster totalWeight instead of 0 (#4439)
  • Special Thanks: @alpha-baby
• transport: unblock read throttling when controlbuf exits (#4447)
• client: fix status code to return Unavailable for servers shutting down instead of Unknown (#4561)

Documentation

• doc: fix broken benchmark dashboard link in README.md (#4503)
  • Special Thanks: @laststem
• example: improve hello world server with starting msg (#4468)
  • Special Thanks: @dkkb
• client: Clarify that WaitForReady will block for CONNECTING channels (#4477)
  • Special Thanks: @evanj

Release 1.38.1

internal/transport: do not mask ConnectionError (#4561)

Release 1.38.0

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)

Documentation

• examples: update xds examples for PSM security (#4256)
• grpc: improve docs on StreamDesc (#4397)

Release 1.37.1

• client: fix rare panic when shutting down client while receiving the first name resolver update (#4398)
• client: fix leaked addrConn struct when addresses are updated (#4347)
• xds/resolver: prevent panic when two LDS updates are receives without RDS in between (#4327)

Release 1.37.0

API Changes

• balancer: Add UpdateAddresses() to balancer.ClientConn interface (#4215)
  • NOTICE: balancer.SubConn.UpdateAddresses() is now deprecated and will be REMOVED in gRPC-Go 1.39

Behavior Changes

• balancer/base: keep address attributes for pickers (#4253)
  • Special Thanks: @longXboy

New Features

• xds: add support for csds (#4226, #4217, #4243)
• admin: create admin package for conveniently registering standard admin services (#4274)
• xds: add support for HTTP filters (gRFC A39) (#4206, #4221)
• xds: implement fault injection HTTP filter (A33) (#4236)
• xds: enable timeout, circuit breaking, and fault injection by default (#4286)
• xds: implement a priority based load balancer (#4070)
• xds/creds: support all SAN matchers on client-side (#4246)

Bug Fixes

• xds: add env var protection for client-side security (#4247)
• circuit breaking: update picker inline when there's a counter update (#4212)
• server: fail RPCs without POST HTTP method (#4241)

Release 1.36.1

• xds: add env var protection for client-side security (#4247)

Release 1.35.1

• encoding/proto: do not panic when types do not match (#4218)
• xds: add env var protection for client-side security (#4247)

Release 1.34.2

• encoding/proto: do not panic when types do not match (#4218)
• xds: add env var protection for client-side security (#4247)

Release 1.36.0

New Features

• xds bootstrap: support config content in env variable (#4153)

Bug Fixes

• encoding/proto: do not panic when types do not match (#4218)

Documentation

• status: document nil error handling of FromError (#4196)
  • Special Thanks: @gauravgahlot

protoc-gen-go-grpc v1.1.0

• Export grpc.ServiceDesc (#4035)
  • Special Thanks: @resec
• Add gRPC-Go version comment (#4152)