fixup panic

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.gitignore

@@ -13,3 +13,9 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
+
+# General
+.DS_Store
+.idea
+.vscode
+bin/

carrier.go

@@ -2,6 +2,7 @@ package kgo
 
 import (
 	"github.com/twmb/franz-go/pkg/kgo"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 // RecordCarrier injects and extracts traces from a kgo.Record.
@@ -51,3 +52,25 @@ func (c RecordCarrier) Keys() []string {
 	}
 	return out
 }
+
+func setHeaders(r *kgo.Record, md metadata.Metadata) {
+	seen := make(map[string]struct{})
+loop:
+	for k, v := range md {
+		for i := 0; i < len(r.Headers); i++ {
+			if r.Headers[i].Key == k {
+				// Key exist, update the value.
+				r.Headers[i].Value = []byte(v)
+				continue loop
+			} else if _, ok := seen[k]; ok {
+				continue loop
+			}
+			// Key does not exist, append new header.
+			r.Headers = append(r.Headers, kgo.RecordHeader{
+				Key:   k,
+				Value: []byte(v),
+			})
+			seen[k] = struct{}{}
+		}
+	}
+}

go.mod

@@ -1,24 +1,25 @@
 module go.unistack.org/micro-broker-kgo/v3
 
-go 1.21
+go 1.22.7
 
-toolchain go1.22.1
+toolchain go1.23.3
 
 require (
 	github.com/google/uuid v1.6.0
-	github.com/twmb/franz-go v1.16.1
-	github.com/twmb/franz-go/pkg/kadm v1.11.0
-	github.com/twmb/franz-go/pkg/kmsg v1.7.0
-	go.opentelemetry.io/otel v1.25.0
-	go.unistack.org/micro/v3 v3.10.59
+	github.com/twmb/franz-go v1.18.0
+	github.com/twmb/franz-go/pkg/kadm v1.14.0
+	github.com/twmb/franz-go/pkg/kmsg v1.9.0
+	go.opentelemetry.io/otel v1.32.0
+	go.unistack.org/micro/v3 v3.11.0
 )
 
 require (
-	github.com/klauspost/compress v1.17.8 // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/pierrec/lz4/v4 v4.1.21 // indirect
-	golang.org/x/crypto v0.22.0 // indirect
-	golang.org/x/sys v0.19.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240412170617-26222e5d3d56 // indirect
-	google.golang.org/grpc v1.63.2 // indirect
-	google.golang.org/protobuf v1.33.0 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
+	golang.org/x/crypto v0.29.0 // indirect
+	golang.org/x/sys v0.27.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a // indirect
+	google.golang.org/grpc v1.68.0 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
 )

go.sum

@@ -1,40 +1,28 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0NAMnU=
-github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
+github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
 github.com/pierrec/lz4/v4 v4.1.21 h1:yOVMLb6qSIDP67pl/5F7RepeKYu/VmTyEXvuMI5d9mQ=
 github.com/pierrec/lz4/v4 v4.1.21/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
-github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/twmb/franz-go v1.16.1 h1:rpWc7fB9jd7TgmCyfxzenBI+QbgS8ZfJOUQE+tzPtbE=
-github.com/twmb/franz-go v1.16.1/go.mod h1:/pER254UPPGp/4WfGqRi+SIRGE50RSQzVubQp6+N4FA=
-github.com/twmb/franz-go/pkg/kadm v1.11.0 h1:FfeWJ0qadntFpAcQt8JzNXW4dijjytZNLrzJuzzzuxA=
-github.com/twmb/franz-go/pkg/kadm v1.11.0/go.mod h1:qrhkdH+SWS3ivmbqOgHbpgVHamhaKcjH0UM+uOp0M1A=
-github.com/twmb/franz-go/pkg/kmsg v1.7.0 h1:a457IbvezYfA5UkiBvyV3zj0Is3y1i8EJgqjJYoij2E=
-github.com/twmb/franz-go/pkg/kmsg v1.7.0/go.mod h1:se9Mjdt0Nwzc9lnjJ0HyDtLyBnaBDAd7pCje47OhSyw=
-go.opentelemetry.io/otel v1.25.0 h1:gldB5FfhRl7OJQbUHt/8s0a7cE8fbsPAtdpRaApKy4k=
-go.opentelemetry.io/otel v1.25.0/go.mod h1:Wa2ds5NOXEMkCmUou1WA7ZBfLTHWIsp034OVD7AO+Vg=
-go.unistack.org/micro/v3 v3.10.59 h1:eneYXJLgyu5MZpSvyI0K17CeXvgOoUCN5dWZaPV5lI4=
-go.unistack.org/micro/v3 v3.10.59/go.mod h1:erMgt3Bl7vQQ0e9UpQyR5NlLiZ9pKeEJ9+1tfYFaqUg=
-golang.org/x/crypto v0.22.0 h1:g1v0xeRhjcugydODzvb3mEM9SQ0HGp9s/nh3COQ/C30=
-golang.org/x/crypto v0.22.0/go.mod h1:vr6Su+7cTlO45qkww3VDJlzDn0ctJvRgYbC2NvXHt+M=
-golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
-golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
-golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
-golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240412170617-26222e5d3d56 h1:zviK8GX4VlMstrK3JkexM5UHjH1VOkRebH9y3jhSBGk=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240412170617-26222e5d3d56/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
-google.golang.org/grpc v1.63.2 h1:MUeiw1B2maTVZthpU5xvASfTh3LDbxHd6IJ6QQVU+xM=
-google.golang.org/grpc v1.63.2/go.mod h1:WAX/8DgncnokcFUldAxq7GeB5DXHDbMF+lLvDomNkRA=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+github.com/twmb/franz-go v1.18.0 h1:25FjMZfdozBywVX+5xrWC2W+W76i0xykKjTdEeD2ejw=
+github.com/twmb/franz-go v1.18.0/go.mod h1:zXCGy74M0p5FbXsLeASdyvfLFsBvTubVqctIaa5wQ+I=
+github.com/twmb/franz-go/pkg/kadm v1.14.0 h1:nAn1co1lXzJQocpzyIyOFOjUBf4WHWs5/fTprXy2IZs=
+github.com/twmb/franz-go/pkg/kadm v1.14.0/go.mod h1:XjOPz6ZaXXjrW2jVCfLuucP8H1w2TvD6y3PT2M+aAM4=
+github.com/twmb/franz-go/pkg/kmsg v1.9.0 h1:JojYUph2TKAau6SBtErXpXGC7E3gg4vGZMv9xFU/B6M=
+github.com/twmb/franz-go/pkg/kmsg v1.9.0/go.mod h1:CMbfazviCyY6HM0SXuG5t9vOwYDHRCSrJJyBAe5paqg=
+go.opentelemetry.io/otel v1.32.0 h1:WnBN+Xjcteh0zdk01SVqV55d/m62NJLJdIyb4y/WO5U=
+go.opentelemetry.io/otel v1.32.0/go.mod h1:00DCVSB0RQcnzlwyTfqtxSm+DRr9hpYrHjNGiBHVQIg=
+go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqtEa9Q=
+go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
+go.unistack.org/micro/v3 v3.11.0 h1:usQ+8wQuOWpQd4+DGhFXSgZ+e+wOBjuT3W5GJZ02bSs=
+go.unistack.org/micro/v3 v3.11.0/go.mod h1:YzMldzHN9Ei+zy5t/Psu7RUWDZwUfrNYiStSQtTz90g=
+golang.org/x/crypto v0.29.0 h1:L5SG1JTTXupVV3n6sUqMTeWbjAyfPwoda2DLX8J8FrQ=
+golang.org/x/crypto v0.29.0/go.mod h1:+F4F4N5hv6v38hfeYwTdx20oUvLLc+QfrE9Ax9HtgRg=
+golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=
+golang.org/x/sys v0.27.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a h1:hgh8P4EuoxpsuKMXX/To36nOFD7vixReXgn8lPGnt+o=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241202173237-19429a94021a/go.mod h1:5uTbfoYQed2U9p3KIj2/Zzm02PYhndfdmML0qC3q3FU=
+google.golang.org/grpc v1.68.0 h1:aHQeeJbo8zAkAa3pRzrVjZlbz6uSfeOXlJNQM0RAbz0=
+google.golang.org/grpc v1.68.0/go.mod h1:fmSPC5AsjSBCK54MyHRx48kpOti1/jRfOlwEWywNjWA=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=

kgo.go

@@ -6,8 +6,10 @@ import (
 	"errors"
 	"fmt"
 	"math/rand"
+	"net/http"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/google/uuid"
@@ -59,12 +61,24 @@ type Broker struct {
 	init      bool
 	c         *kgo.Client
 	kopts     []kgo.Opt
-	connected bool
+	connected *atomic.Uint32
 	sync.RWMutex
 	opts broker.Options
 	subs []*Subscriber
 }
 
+func (r *Broker) Live() bool {
+	return r.connected.Load() == 1
+}
+
+func (r *Broker) Ready() bool {
+	return r.connected.Load() == 1
+}
+
+func (r *Broker) Health() bool {
+	return r.connected.Load() == 1
+}
+
 func (k *Broker) Address() string {
 	return strings.Join(k.opts.Addrs, ",")
 }
@@ -124,12 +138,9 @@ func (k *Broker) connect(ctx context.Context, opts ...kgo.Opt) (*kgo.Client, *ho
 }
 
 func (k *Broker) Connect(ctx context.Context) error {
-	k.RLock()
-	if k.connected {
-		k.RUnlock()
+	if k.connected.Load() == 1 {
 		return nil
 	}
-	k.RUnlock()
 
 	nctx := k.opts.Context
 	if ctx != nil {
@@ -143,19 +154,16 @@ func (k *Broker) Connect(ctx context.Context) error {
 
 	k.Lock()
 	k.c = c
-	k.connected = true
+	k.connected.Store(1)
 	k.Unlock()
 
 	return nil
 }
 
 func (k *Broker) Disconnect(ctx context.Context) error {
-	k.RLock()
-	if !k.connected {
-		k.RUnlock()
+	if k.connected.Load() == 0 {
 		return nil
 	}
-	k.RUnlock()
 
 	nctx := k.opts.Context
 	if ctx != nil {
@@ -185,7 +193,7 @@ func (k *Broker) Disconnect(ctx context.Context) error {
 		}
 	}
 
-	k.connected = false
+	k.connected.Store(0)
 	return nil
 }
 
@@ -240,14 +248,14 @@ func (k *Broker) Publish(ctx context.Context, topic string, msg *broker.Message,
 
 func (k *Broker) publish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
 	k.Lock()
-	if !k.connected {
+	if k.connected.Load() == 0 {
 		c, _, err := k.connect(ctx, k.kopts...)
 		if err != nil {
 			k.Unlock()
 			return err
 		}
 		k.c = c
-		k.connected = true
+		k.connected.Store(1)
 	}
 	k.Unlock()
 
@@ -275,7 +283,7 @@ func (k *Broker) publish(ctx context.Context, msgs []*broker.Message, opts ...br
 		if options.BodyOnly || k.opts.Codec.String() == "noop" {
 			rec.Value = msg.Body
 			for k, v := range msg.Header {
-				rec.Headers = append(rec.Headers, kgo.RecordHeader{Key: k, Value: []byte(v)})
+				rec.Headers = append(rec.Headers, kgo.RecordHeader{Key: http.CanonicalHeaderKey(k), Value: []byte(v)})
 			}
 		} else {
 			rec.Value, err = k.opts.Codec.Marshal(msg)
@@ -436,12 +444,13 @@ func NewBroker(opts ...broker.Option) *Broker {
 		kgo.DialTimeout(3 * time.Second),
 		kgo.DisableIdempotentWrite(),
 		kgo.ProducerBatchCompression(kgo.NoCompression()),
-		kgo.WithLogger(&mlogger{l: options.Logger.Clone(logger.WithCallerSkipCount(options.Logger.Options().CallerSkipCount + 2)), ctx: options.Context}),
+		kgo.WithLogger(&mlogger{l: options.Logger.Clone(logger.WithAddCallerSkipCount(2)), ctx: options.Context}),
 		kgo.SeedBrokers(kaddrs...),
 		kgo.RetryBackoffFn(DefaultRetryBackoffFn),
 		kgo.BlockRebalanceOnPoll(),
 		kgo.Balancers(kgo.CooperativeStickyBalancer()),
 		kgo.FetchIsolationLevel(kgo.ReadUncommitted()),
+		kgo.UnknownTopicRetries(0),
 	}
 
 	if options.Context != nil {
@@ -451,7 +460,8 @@ func NewBroker(opts ...broker.Option) *Broker {
 	}
 
 	return &Broker{
-		opts:  options,
-		kopts: kopts,
+		connected: &atomic.Uint32{},
+		opts:      options,
+		kopts:     kopts,
 	}
 }

kgo_test.go

@@ -50,7 +50,7 @@ func TestPubSub(t *testing.T) {
 		t.Skip()
 	}
 
-	if err := logger.DefaultLogger.Init(logger.WithLevel(loglevel), logger.WithCallerSkipCount(3)); err != nil {
+	if err := logger.DefaultLogger.Init(logger.WithLevel(loglevel)); err != nil {
 		t.Fatal(err)
 	}
 	ctx := context.Background()

logger.go

@@ -28,11 +28,8 @@ func (l *mlogger) Log(lvl kgo.LogLevel, msg string, args ...interface{}) {
 	default:
 		return
 	}
-	if len(args) > 0 {
-		l.l.Log(l.ctx, mlvl, append([]interface{}{msg}, args...)...)
-	} else {
-		l.l.Log(l.ctx, mlvl, msg)
-	}
+
+	l.l.Log(l.ctx, mlvl, msg, args...)
 }
 
 func (l *mlogger) Level() kgo.LogLevel {

subscriber.go

@@ -2,6 +2,7 @@ package kgo
 
 import (
 	"context"
+	"fmt"
 	"strconv"
 	"sync"
 	"time"
@@ -136,7 +137,7 @@ func (s *Subscriber) poll(ctx context.Context) {
 				return
 			}
 			fetches.EachError(func(t string, p int32, err error) {
-				s.kopts.Logger.Fatalf(ctx, "[kgo] fetch topic %s partition %d err: %v", t, p, err)
+				s.kopts.Logger.Fatal(ctx, fmt.Sprintf("[kgo] fetch topic %s partition %d error", t, p), err)
 			})
 
 			fetches.EachPartition(func(p kgo.FetchTopicPartition) {
@@ -158,7 +159,9 @@ func (s *Subscriber) killConsumers(ctx context.Context, lost map[string][]int32)
 			pc := s.consumers[tp]
 			delete(s.consumers, tp)
 			close(pc.quit)
-			s.kopts.Logger.Debugf(ctx, "[kgo] waiting for work to finish topic %s partition %d", topic, partition)
+			if s.kopts.Logger.V(logger.DebugLevel) {
+				s.kopts.Logger.Debug(ctx, fmt.Sprintf("[kgo] waiting for work to finish topic %s partition %d", topic, partition))
+			}
 			wg.Add(1)
 			go func() { <-pc.done; wg.Done() }()
 		}
@@ -166,15 +169,19 @@ func (s *Subscriber) killConsumers(ctx context.Context, lost map[string][]int32)
 }
 
 func (s *Subscriber) lost(ctx context.Context, _ *kgo.Client, lost map[string][]int32) {
-	s.kopts.Logger.Debugf(ctx, "[kgo] lost %#+v", lost)
+	if s.kopts.Logger.V(logger.DebugLevel) {
+		s.kopts.Logger.Debug(ctx, fmt.Sprintf("[kgo] lost %#+v", lost))
+	}
 	s.killConsumers(ctx, lost)
 }
 
 func (s *Subscriber) revoked(ctx context.Context, c *kgo.Client, revoked map[string][]int32) {
-	s.kopts.Logger.Debugf(ctx, "[kgo] revoked %#+v", revoked)
+	if s.kopts.Logger.V(logger.DebugLevel) {
+		s.kopts.Logger.Debug(ctx, fmt.Sprintf("[kgo] revoked %#+v", revoked))
+	}
 	s.killConsumers(ctx, revoked)
 	if err := c.CommitMarkedOffsets(ctx); err != nil {
-		s.kopts.Logger.Errorf(ctx, "[kgo] revoked CommitMarkedOffsets err: %v", err)
+		s.kopts.Logger.Error(ctx, "[kgo] revoked CommitMarkedOffsets error", err)
 	}
 }
 
@@ -203,8 +210,10 @@ func (s *Subscriber) assigned(_ context.Context, c *kgo.Client, assigned map[str
 
 func (pc *consumer) consume() {
 	defer close(pc.done)
-	pc.kopts.Logger.Debugf(pc.kopts.Context, "starting, topic %s partition %d", pc.topic, pc.partition)
-	defer pc.kopts.Logger.Debugf(pc.kopts.Context, "killing, topic %s partition %d", pc.topic, pc.partition)
+	if pc.kopts.Logger.V(logger.DebugLevel) {
+		pc.kopts.Logger.Debug(pc.kopts.Context, fmt.Sprintf("starting, topic %s partition %d", pc.topic, pc.partition))
+		defer pc.kopts.Logger.Debug(pc.kopts.Context, fmt.Sprintf("killing, topic %s partition %d", pc.topic, pc.partition))
+	}
 
 	eh := pc.kopts.ErrorHandler
 	if pc.opts.ErrorHandler != nil {
@@ -251,7 +260,7 @@ func (pc *consumer) consume() {
 								pc.c.MarkCommitRecords(record)
 							} else {
 								eventPool.Put(p)
-								pc.kopts.Logger.Fatalf(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
+								pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
 								return
 							}
 							eventPool.Put(p)
@@ -260,16 +269,14 @@ func (pc *consumer) consume() {
 							pc.kopts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
 							continue
 						} else {
-							if pc.kopts.Logger.V(logger.ErrorLevel) {
-								pc.kopts.Logger.Errorf(pc.kopts.Context, "[kgo]: failed to unmarshal: %v", err)
-							}
+							pc.kopts.Logger.Error(pc.kopts.Context, "[kgo]: unmarshal error", err)
 						}
 						te := time.Since(ts)
 						pc.kopts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", record.Topic, "topic", record.Topic).Dec()
 						pc.kopts.Meter.Summary(semconv.SubscribeMessageLatencyMicroseconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
 						pc.kopts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", record.Topic, "topic", record.Topic).Update(te.Seconds())
 						eventPool.Put(p)
-						pc.kopts.Logger.Fatalf(pc.kopts.Context, "[kgo] Unmarshal err not handled wtf?")
+						pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] Unmarshal err not handled wtf?")
 						sp.Finish()
 						return
 					}
@@ -294,7 +301,7 @@ func (pc *consumer) consume() {
 						sp.AddEvent("error handler stop")
 					} else {
 						if pc.kopts.Logger.V(logger.ErrorLevel) {
-							pc.kopts.Logger.Errorf(pc.kopts.Context, "[kgo]: subscriber error: %v", err)
+							pc.kopts.Logger.Error(pc.kopts.Context, "[kgo]: subscriber error", err)
 						}
 					}
 				}
@@ -306,7 +313,7 @@ func (pc *consumer) consume() {
 					pc.c.MarkCommitRecords(record)
 				} else {
 					eventPool.Put(p)
-					pc.kopts.Logger.Fatalf(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
+					pc.kopts.Logger.Fatal(pc.kopts.Context, "[kgo] ErrLostMessage wtf?")
 					sp.SetStatus(tracer.SpanStatusError, "ErrLostMessage")
 					sp.Finish()
 					return

tracer.go

@@ -16,6 +16,8 @@ type hookTracer struct {
 	tracer   tracer.Tracer
 }
 
+var messagingSystem = semconv.MessagingSystemKey.String("kafka")
+
 var (
 	_ kgo.HookProduceRecordBuffered   = (*hookTracer)(nil)
 	_ kgo.HookProduceRecordUnbuffered = (*hookTracer)(nil)
@@ -32,7 +34,7 @@ var (
 func (m *hookTracer) OnProduceRecordBuffered(r *kgo.Record) {
 	// Set up span options.
 	attrs := []interface{}{
-		semconv.MessagingSystemKey.String("kafka"),
+		messagingSystem,
 		semconv.MessagingDestinationKindTopic,
 		semconv.MessagingDestinationName(r.Topic),
 		semconv.MessagingOperationPublish,
@@ -50,23 +52,23 @@ func (m *hookTracer) OnProduceRecordBuffered(r *kgo.Record) {
 		r.Context = context.Background()
 	}
 
-	md, ok := metadata.FromOutgoingContext(r.Context)
+	omd, ok := metadata.FromOutgoingContext(r.Context)
 	if !ok {
-		md = metadata.New(len(r.Headers))
+		omd = metadata.New(len(r.Headers))
 	}
+
+	md := metadata.Copy(omd)
 	for _, h := range r.Headers {
 		md.Set(h.Key, string(h.Value))
 	}
 
-	// Inject the span context into the record.
-	// t.propagators.Inject(ctx, NewRecordCarrier(r))
-	// Update the record context.
-
 	if !ok {
-		r.Context, _ = m.tracer.Start(metadata.NewOutgoingContext(r.Context, md), r.Topic+" publish", opts...)
+		r.Context, _ = m.tracer.Start(metadata.NewOutgoingContext(r.Context, md), "sdk.broker", opts...)
 	} else {
-		r.Context, _ = m.tracer.Start(r.Context, r.Topic+" publish", opts...)
+		r.Context, _ = m.tracer.Start(r.Context, "sdk.broker", opts...)
 	}
+
+	setHeaders(r, omd)
 }
 
 // OnProduceRecordUnbuffered continues and ends the "publish" span for an
@@ -75,14 +77,15 @@ func (m *hookTracer) OnProduceRecordBuffered(r *kgo.Record) {
 // It sets attributes with values unset when producing and records any error
 // that occurred during the publish operation.
 func (m *hookTracer) OnProduceRecordUnbuffered(r *kgo.Record, err error) {
-	span, _ := tracer.SpanFromContext(r.Context)
-	span.AddLabels(
-		semconv.MessagingKafkaDestinationPartition(int(r.Partition)),
-	)
-	if err != nil {
-		span.SetStatus(tracer.SpanStatusError, err.Error())
+	if span, ok := tracer.SpanFromContext(r.Context); ok {
+		span.AddLabels(
+			semconv.MessagingKafkaDestinationPartition(int(r.Partition)),
+		)
+		if err != nil {
+			span.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+		span.Finish()
 	}
-	span.Finish()
 }
 
 // OnFetchRecordBuffered starts a new span for the "receive" operation on a
@@ -95,7 +98,7 @@ func (m *hookTracer) OnProduceRecordUnbuffered(r *kgo.Record, err error) {
 func (m *hookTracer) OnFetchRecordBuffered(r *kgo.Record) {
 	// Set up the span options.
 	attrs := []interface{}{
-		semconv.MessagingSystemKey.String("kafka"),
+		messagingSystem,
 		semconv.MessagingSourceKindTopic,
 		semconv.MessagingSourceName(r.Topic),
 		semconv.MessagingOperationReceive,
@@ -116,24 +119,23 @@ func (m *hookTracer) OnFetchRecordBuffered(r *kgo.Record) {
 	if r.Context == nil {
 		r.Context = context.Background()
 	}
-	md, ok := metadata.FromIncomingContext(r.Context)
+	omd, ok := metadata.FromIncomingContext(r.Context)
 	if !ok {
-		md = metadata.New(len(r.Headers))
+		omd = metadata.New(len(r.Headers))
 	}
+
+	md := metadata.Copy(omd)
 	for _, h := range r.Headers {
 		md.Set(h.Key, string(h.Value))
 	}
 
-	// Extract the span context from the record.
-	// ctx := t.propagators.Extract(r.Context, NewRecordCarrier(r))
-	// Start the "receive" span.
 	if !ok {
-		r.Context, _ = m.tracer.Start(metadata.NewIncomingContext(r.Context, md), r.Topic+" receive", opts...)
+		r.Context, _ = m.tracer.Start(metadata.NewIncomingContext(r.Context, md), "sdk.broker", opts...)
 	} else {
-		r.Context, _ = m.tracer.Start(r.Context, r.Topic+" receive", opts...)
+		r.Context, _ = m.tracer.Start(r.Context, "sdk.broker", opts...)
 	}
 
-	// Update the record context.
+	setHeaders(r, omd)
 }
 
 // OnFetchRecordUnbuffered continues and ends the "receive" span for an
@@ -155,7 +157,7 @@ func (m *hookTracer) OnFetchRecordUnbuffered(r *kgo.Record, _ bool) {
 func (m *hookTracer) WithProcessSpan(r *kgo.Record) (context.Context, tracer.Span) {
 	// Set up the span options.
 	attrs := []interface{}{
-		semconv.MessagingSystemKey.String("kafka"),
+		messagingSystem,
 		semconv.MessagingSourceKindTopic,
 		semconv.MessagingSourceName(r.Topic),
 		semconv.MessagingOperationProcess,
@@ -186,7 +188,7 @@ func (m *hookTracer) WithProcessSpan(r *kgo.Record) (context.Context, tracer.Spa
 	}
 
 	// Start a new span using the provided context and options.
-	return m.tracer.Start(r.Context, r.Topic+" process", opts...)
+	return m.tracer.Start(r.Context, "sdk.broker", opts...)
 }
 
 func maybeKeyAttr(attrs []interface{}, r *kgo.Record) []interface{} {