Sourced fromgoogle.golang.org/grpc's releases.

Release 1.77.0

API Changes

• mem: Replace theReader interface with a struct for better performance and maintainability. (#8669)

Behavior Changes

• balancer/pickfirst: Remove support for the oldpick_first LB policy via the environment variableGRPC_EXPERIMENTAL_ENABLE_NEW_PICK_FIRST=false. The newpick_first has been the default sincev1.71.0. (#8672)

Bug Fixes

• xdsclient: Fix a race condition in the ADS stream implementation that could result inresource-not-found errors, causing the gRPC client channel to move toTransientFailure. (#8605)
• client: Ignore HTTP status header for gRPC streams. (#8548)
• client: Set a read deadline when closing a transport to prevent it from blocking indefinitely on a broken connection. (#8534)
  • Special Thanks:@​jgold2-stripe
• client: Fix a bug where default port 443 was not automatically added to addresses without a specified port when sent to a proxy.
  • Setting environment variableGRPC_EXPERIMENTAL_ENABLE_DEFAULT_PORT_FOR_PROXY_TARGET=false disables this change; please file a bug if any problems are encountered as we will remove this option soon. (#8613)
• balancer/pickfirst: Fix a bug where duplicate addresses were not being ignored as intended. (#8611)
• server: Fix a bug that caused overcounting of channelz metrics for successful and failed streams. (#8573)
  • Special Thanks:@​hugehoo
• balancer/pickfirst: When configured, shuffle addresses in resolver updates that lack endpoints. Since gRPC automatically adds endpoints to resolver updates, this bug only affects custom LB policies that delegate topick_first but don't set endpoints. (#8610)
• mem: Clear large buffers before re-using. (#8670)

Performance Improvements

• transport: Reduce heap allocations to reduce time spent in garbage collection. (#8624,#8630,#8639,#8668)
• transport: Avoid copies when reading and writing Data frames. (#8657,#8667)
• mem: Avoid clearing newly allocated buffers. (#8670)

New Features

• outlierdetection: Add metrics specified ingRFC A91. (#8644)
  • Special Thanks:@​davinci26,@​PardhuKonakanchi
• stats/opentelemetry: Add support for optional labelgrpc.lb.backend_service in per-call metrics (#8637)
• xds: Add support for JWT Call Credentials as specified ingRFC A97. Set environment variableGRPC_EXPERIMENTAL_XDS_BOOTSTRAP_CALL_CREDS=true to enable this feature. (#8536)
  • Special Thanks:@​dimpavloff
• experimental/stats: Add support for up/down counters. (#8581)

• 805b1f8 Change version to 1.77.0 (#8677)
• ea7b66e Cherrypick#8702 to v1.77.x (#8709)
• cadae08 Cherry-pick#8536 to v1.77.x (#8691)
• 4288cfc Cherrypick#8657 and#8667 to v1.77.x (#8690)
• f959da6 transport: Reduce heap allocations (#8668)
• 0d49384 deps: update all dependencies (#8673)
• e3e142d pickfirst: Remove old pickfirst (#8672)
• 254ab10 documentation: fix typos in benchmark and auth docs (#8674)
• 2d56bda mem: Remove Reader interface and export the concrete struct (#8669)
• 8ab0c82 mem: Avoid clearing new buffers and clear buffers from simpleBufferPools (#8670)
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