Release 1.24.0

Dependencies

• internal: update proto library version used to generate pb.go files (#3025)

New Features

• xds: add functionality to read bootstrap file. (#3000)

Performance Improvements

• transport: remove defer in http2Client.getStream (#2980)
  • Special Thanks: @dzbarsky
• transport: derive transport context from context.Background (#2930)
  • Special Thanks: @JNProtzman

Bug Fixes

• client: consider service config invalid if loadBalancingConfig contains no supported policy (#3034)
• credentials/alts: fix panic detecting GCP environment (#2996)
  • Special Thanks: @mwhudson
• internal: fix context leak when stream is not created successfully (#2985)
• grpclb: fix deadlock in grpclb connection cache (#3017)
• server: set and advertise max frame size of 16KB (#3018)

Release 1.21.4

• server: set and advertise max frame size of 16KB (#3018)

Release 1.23.1

• server: set and advertise max frame size of 16KB (#3018)

• grpclb: fix deadlock in grpclb connection cache (#3017)

  Before the fix, if the timer to remove a SubConn fires at the same time
  NewSubConn cancels the timer, it caused a mutex leak and deadlock.

Release 1.22.3

• server: set and advertise max frame size of 16KB (#3018)

• grpclb: fix deadlock in grpclb connection cache (#3017)

  Before the fix, if the timer to remove a SubConn fires at the same time
  NewSubConn cancels the timer, it caused a mutex leak and deadlock.

Release 1.23.0

Security

• transport: block reading frames when too many transport control frames are queued (#2970)
  • Addresses CVE-2019-9512 (Ping Flood), CVE-2019-9514 (Reset Flood), and CVE-2019-9515 (Settings Flood).

API Changes

• xds: move code to a root level xds directory (#2950)

Behavior Changes

• client: remove option to send RPCs before HTTP/2 handshake is completed (#2904)

New Features

• grpclb: enable keepalive (#2918)
• balancer: start populating weight by edsbalancer for weighted_round_robin (#2945)
  • Special Thanks: @alazarev
• wrr: add EDF implementation of weighted round robin. (#2957)
  • Special Thanks: @alazarev
• status: Implement *statusError.Is (#2868)
  • Special Thanks: @jsm

Performance Improvements

• server: avoid an unnecessary allocation per-RPC for OK status (#2920)
  • Special Thanks: @dzbarsky
• server: avoid call to trace.FromContext and resulting allocations when tracing is disabled (#2926)
  • Special Thanks: @dzbarsky
• http2client: remove unnecessary allocations for header fields (#2925)
  • Special Thanks: @dzbarsky
• status: avoid allocations when returning an OK status (#2929)
  • Special Thanks: @dzbarsky
• server: avoid allocations related to tracking excessive pings (#2923)
  • Special Thanks: @dzbarsky

Bug Fixes

• transport: call Unlock in defer to avoid data race (#2953)
  • Special Thanks: @lzhfromustc
• client: fix canceled vs deadline exceeded double-check logic (#2906)
• grpclb: recreate SubConns when switching fallback in case credentials change (#2899)
• server: populate WireLength on stats.InPayload for unary RPCs (#2932)
  • Special Thanks: @ajwerner
• client: fix race between transport draining and new RPCs (#2919)
• balancer: filter out grpclb addresses if balancer is not grpclb (#2907)

Documentation

• docs: clarify "deprecated" to indicate whether some features may be removed in 1.x (#2900)

Release 1.22.2

Security

• transport: block reading frames when too many transport control frames are queued (#2970)

  Addresses CVE-2019-9512 (Ping Flood), CVE-2019-9514 (Reset Flood), and CVE-2019-9515 (Settings Flood).

Release 1.21.3

Security

• transport: block reading frames when too many transport control frames are queued (#2970)

  Addresses CVE-2019-9512 (Ping Flood), CVE-2019-9514 (Reset Flood), and CVE-2019-9515 (Settings Flood).

Release 1.22.1

• server: populate WireLength on stats.InPayload for unary RPCs

Release 1.21.2

• server: populate WireLength on stats.InPayload for unary RPCs

Release 1.22.0

New Features

• balancer/resolver: add loadBalancingConfig and pre-parsing support (#2732)

Performance Improvements

• transport: share recv buffers (#2813)
• Remove call to proto.Clone() in http2Server.WriteStatus. (#2842)

Bug Fixes

• balancer: stop using picker from old balancer when switching balancers (#2833)
• server: fix race causing streams to be terminated by GracefulStop (#2857)
• grpclb: only force update picker when cache is used (#2843)
• metadata: write original md before appended md (#2879)
  • Special Thanks: @elvizlai
• transport: fix bug leading to hang when invalid headers are received (#2818)
• client: don't reset backoff if updating addresses while in TransientFailure (#2740)

Documentation

• examples: note about ALTS special access permission on GCP (#2846)