Release 1.48.0

Bug Fixes

• xds/priority: fix bug that could prevent higher priorities from receiving config updates (#5417)
• RLS load balancer: don't propagate the status code returned on control plane RPCs to data plane RPCs (#5400)

New Features

• stats: add support for multiple stats handlers in a single client or server (#5347)
• gcp/observability: add experimental OpenCensus tracing/metrics support (#5372)
• xds: enable aggregate and logical DNS clusters by default (#5380)
• credentials/google (for xds): support xdstp C2P cluster names (#5399)

Release 1.47.0

New Features

• xds: add support for RBAC metadata invert matchers (#5345)

Bug Fixes

• client: fix a context leaked if a connection to an address is lost before it is fully established (#5337)
  • Special Thanks: @carzil
• client: fix potential panic during RPC retries (#5323)
• xds/client: fix a potential concurrent map read/write in load reporting (#5331)
• client/SubConn: do not recreate addrConn if UpdateAddresses is called with the same addresses (#5373)
• xds/eds: resources containing duplicate localities with the same priority will be rejected (#5303)
• server: return Canceled or DeadlineExceeded status code when writing headers to a stream that is already closed (#5292)
  • Special Thanks: @idiamond-stripe

Behavior Changes

• xds/priority: start the init timer when a child switches to Connecting from non-failure states (#5334)
• server: respond with HTTP Status 405 and gRPC status INTERNAL if the method sent to server is not POST (#5364)

Documentation

• server: clarify documentation around setting and sending headers and ServerStream errors (#5302)

Release v1.46.2

Bug Fixes

• client: fix potential panic during RPC retries (#5323)
• xds: fix leak of deleted CDS resources from CSDS view (#5339)

Release 1.46.0

New Features

• server: Support setting TCP_USER_TIMEOUT on grpc.Server connections using keepalive.ServerParameters.Time (#5219)
  • Special Thanks: @bonnefoa
• client: perform graceful switching of LB policies in the ClientConn by default (#5285)
• all: improve logging by including channelz identifier in log messages (#5192)

API Changes

• grpc: delete WithBalancerName() API, deprecated over 4 years ago in #1697 (#5232)
• balancer: change BuildOptions.ChannelzParentID to an opaque identifier instead of int (#5192)
  • Note: the balancer package is labeled as EXPERIMENTAL, and we don't believe users were using this field.

Behavior Changes

• client: change connectivity state to TransientFailure in pick_first LB policy when all addresses are removed (#5274)
  • This is a minor change that brings grpc-go's behavior in line with the intended behavior and how C and Java behave.
• metadata: add client-side validation of HTTP-invalid metadata before attempting to send (#4886)
  • Special Thanks: @Patrick0308

Bug Fixes

• metadata: make a copy of the value slices in FromContext() functions so that modifications won't be made to the original copy (#5267)
• client: handle invalid service configs by applying the default, if applicable (#5238)
• xds: the xds client will now apply a 1 second backoff before recreating ADS or LRS streams (#5280)

Dependencies

• Upgrade security/authorization module dependencies to https://github.com/google/cel-go v0.10.1 and others (#5243)
  • Special Thanks: @TristonianJones

Release 1.45.0

Bug Fixes

• xds/clusterresolver: pass cluster name to DNS child policy to be used in creds handshake (#5119)
• reflection: support dynamic messages (#5180)
  • Special Thanks: @codebutler

Performance Improvements

• wrr: improve randomWRR performance (#5067)
  • Special Thanks: @huangchong94

Behavior Changes

• server: convert context errors returned by service handlers to status with the correct status code (Canceled or DeadlineExceeded), instead of Unknown (#5156)

New Features

• reflection: add NewServer(ServerOptions) for creating a reflection server with advanced customizations (#5197)
• xds: support federation (#5128)
• xds/resource: accept Self as LDS's RDS config source and CDS's EDS config source (#5152)
• xds/bootstrap: add plugin system for credentials specified in bootstrap file (#5136)

Release 1.44.0

New Features

• balancer: add RLS load balancing policy (#5046)
• xds: add RLS Cluster Specifier Plugin (#5004)
• insecure: remove experimental notice (#5069)

Bug Fixes

• internal/balancergroup: eliminate race in exitIdle (#5012)
• authz: fix regex expression match (#5035)

Documentation

• grpc: minor improvement on WithInsecure() document (#5068)
  • Special Thanks: @shitian-ni
• attributes: document that some value types (e.g. maps) must implement Equal (#5109)
• dialoptions.go: Fix WithBlock godoc (#5073)
  • Special Thanks: @sgreene570
• grpclog.DepthLoggerV2: Correct comment: formats like fmt.Println (#5038)
  • Special Thanks: @evanj

protoc-gen-go-grpc v1.2.0

New Features

• Add protoc and protoc-gen-go-grpc versions to top comment

Bug Fixes

• update google.golang.org/protobuf to v1.27.1 to fix package name generation on macOS
  • NOTE: this includes a behavior change in the protobuf package: https://github.com/protocolbuffers/protobuf-go/releases/tag/v1.26.0#user-content-v1.26-require-import-path

Release 1.43.0

API Changes

• grpc: stabilize WithConnectParams DialOption (#4915)
  • Special Thanks: @hypnoglow

Behavior Changes

• status: support wrapped errors in FromContextError (#4977)
  • Special Thanks: @bestbeforetoday
• config: remove the environment variable to disable retry support (#4922)

New Features

• balancer: new field Authority in BuildOptions for server name to use in the authentication handshake with a remote load balancer (#4969)

Bug Fixes

• xds/resolver: fix possible ClientConn leak upon resolver initialization failure (#4900)
• client: fix nil panic in rare race conditions with the pick first LB policy (#4971)
• xds: improve RPC error messages when xDS connection errors occur (#5032, #5054)
• transport: do not create stream object in the face of illegal stream IDs (#4873)
  • Special Thanks: @uds5501

Documentation

• client: clarify errors to indicate whether compressed or uncompressed messages exceeded size limits (#4918)
  • Special Thanks: @uds5501

Release 1.41.1

• creds/google: add NewDefaultCredentialsWithOptions() to support custom per-RPC creds (#4767, #4830)
• pickfirst: check b.sc before calling Connect (#4971)

Release 1.40.1

• creds/google: add NewDefaultCredentialsWithOptions() to support custom per-RPC creds (#4767, #4830)