API Changes

• alts: Make GoogleDefaultChannelCredentials take a CallCredentials (#8548)
• binder: Support BinderChannelBuilder.forTarget (#8633)
• inprocess: Add support for anonymous in-process servers (#8589)

Bug Fixes

• census: fixed a bug which in rare cases, a NullPointerException may be thrown by recordFinishedAttempt(). Users not enabling grpc-census are not impacted by this bug (#8706)
• xds: stop generating UUIDs for filter chains that lack them. The UUID was preventing the XdsServer from noticing when a control plane sent a needless duplicate update, causing XdsServer to drain all its existing connections to use the “new” configuration #8663
• xds: fix a bug where XdsServer didn’t block start() when configuration is missing, and instead errored. #8660

New Features

• protoc-gen-grpc-java plugin support for Apple M1 architecture (#7690)
• okhttp: introduced new TLS1.2 cipher suites and internal okhttp implementation for TLS1.3 prepared (#8650)
• netty: Add ability to set system property -Dio.grpc.netty.disableConnectionHeaderCheck=false to disable HTTP Connection header check. This is a temporary workaround to allow fixing out-of-spec HTTP/2 clients (#8683)

Dependencies

• bump guava to 30.1.1-android (#8748)
• bump protobuf to 3.19.1 (#8748)

Acknowledgement

@beatrausch
@benjaminp Benjamin Peterson
@cfredri4
@kdubb Kevin Wooten