grpc-java

API Changes

• core: Delete the never-used io.grpc.internal.ReadableBuffer.readBytes(ByteBuffer) (#12580) (738782fb0). This is deeply internal and not accessible, so shouldn’t impact anything. However, Apache Arrow Java [uses reflection to access private fields](https://github.com/apache/arrow-java/blob/96156ccc2bf933c75c852ca7c04418a61f87defd/flight/flight-core/src/main/java/org/apache/ar...

Dependencies

• Downgrade OpenTelemetry to 1.51.0 to make it easier for people dealing with the OkHttp 4.x → 5.x upgrade of some OpenTelemetry modules (354d8b451). gRPC is not using the impacted OpenTelemetry modules. Users are still free to upgrade to newer versions of OpenTelemetry of their choosing.

Bug Fixes

• rls: Avoid missed config update from reentrancy (https://github.com/grpc/grpc-java/pull/12549). This fixes a regression since 1.75.0 triggered by CdsLb being converted to XdsDepManager. Without this fix, a second channel to the same target may hang when starting, causing DEADLINE_EXCEEDED, and unhang when the control plane delivers an update (e.g., endpoint address update)

Bug Fixes

• core: Fix shutdown failing accepted RPCs during channel startup (02e98a806). This fixes a race where RPCs could fail with "UNAVAILABLE: Channel shutdown invoked" even though they were created before channel.shutdown()
• okhttp: Fix race condition overwriting MAX_CONCURRENT_STREAMS (#12548) (8d49dc1c9)
• binder: Stop leaking this from BinderServerTransport's ctor (#12...

Bug Fixes

• rls: Avoid missed config update from reentrancy (https://github.com/grpc/grpc-java/pull/12550). This fixes a regression since 1.75.0 triggered by CdsLb being converted to XdsDepManager. Without this fix, a second channel to the same target may hang when starting, causing DEADLINE_EXCEEDED, and unhang when the control plane delivers an update (e.g., endpoint address update)