go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.43.0: WithRetry

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify otlptracehttp.WithRetry in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0
Demonstrate these symbols/APIs:
  - otlptracehttp.WithRetry

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:f150d9e9a75a61c0d20a20aebac18fae3c506dc36c9e190e185148196adb200c","contract":["otlptracehttp.WithRetry configures exponential backoff retry parameters for the OTLP HTTP trace exporter","otlptracehttp.WithRetry with Enabled: true automatically retries transient HTTP 503 errors on span export","otlptracehttp.WithRetry with Enabled: false returns an export error on transient HTTP 503 without retrying","otlptracehttp.WithRetry stops retrying and returns an error when MaxElapsedTime is exceeded"],"goal":"verify otlptracehttp.WithRetry in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0"],"schemaVersion":1,"symbols":["otlptracehttp.WithRetry"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0","symbols":["otlptracehttp.WithRetry"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require (
	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/go-logr/logr v1.4.3 // indirect
	github.com/go-logr/stdr v1.2.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
	go.opentelemetry.io/otel v1.43.0 // indirect
	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 // indirect
	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.43.0 // indirect
	go.opentelemetry.io/otel/metric v1.43.0 // indirect
	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
	go.opentelemetry.io/otel/trace v1.43.0 // indirect
	go.opentelemetry.io/proto/otlp v1.10.0 // indirect
	golang.org/x/net v0.52.0 // indirect
	golang.org/x/sys v0.42.0 // indirect
	golang.org/x/text v0.35.0 // indirect
	google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/grpc v1.80.0 // indirect
	google.golang.org/protobuf v1.36.11 // indirect
)

github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
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/grpc-ecosystem/grpc-gateway/v2 v2.28.0 h1:HWRh5R2+9EifMyIHV7ZV+MIZqgz+PMpZ14Jynv3O2Zs=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0/go.mod h1:JfhWUomR1baixubs02l85lZYYOm7LV6om4ceouMv45c=
go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
go.opentelemetry.io/otel v1.43.0 h1:mYIM03dnh5zfN7HautFE4ieIig9amkNANT+xcVxAj9I=
go.opentelemetry.io/otel v1.43.0/go.mod h1:JuG+u74mvjvcm8vj8pI5XiHy1zDeoCS2LB1spIq7Ay0=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0 h1:88Y4s2C8oTui1LGM6bTWkw0ICGcOLCAI5l6zsD1j20k=
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.43.0/go.mod h1:Vl1/iaggsuRlrHf/hfPJPvVag77kKyvrLeD10kpMl+A=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.43.0 h1:3iZJKlCZufyRzPzlQhUIWVmfltrXuGyfjREgGP3UUjc=
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.43.0/go.mod h1:/G+nUPfhq2e+qiXMGxMwumDrP5jtzU+mWN7/sjT2rak=
go.opentelemetry.io/otel/metric v1.43.0 h1:d7638QeInOnuwOONPp4JAOGfbCEpYb+K6DVWvdxGzgM=
go.opentelemetry.io/otel/metric v1.43.0/go.mod h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY=
go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg=
go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg=
go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A=
go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
go.opentelemetry.io/proto/otlp v1.10.0 h1:IQRWgT5srOCYfiWnpqUYz9CVmbO8bFmKcwYxpuCSL2g=
go.opentelemetry.io/proto/otlp v1.10.0/go.mod h1:/CV4QoCR/S9yaPj8utp3lvQPoqMtxXdzn7ozvvozVqk=
golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 h1:VPWxll4HlMw1Vs/qXtN7BvhZqsS9cdAittCNvVENElA=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:7QBABkRtR8z+TEnmXTqIqwJLlzrZKVfAUm7tY3yGv0M=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 h1:m8qni9SQFH0tJc1X0vmnpw/0t+AImlSvp30sEupozUg=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"context"
	"fmt"
	"time"

	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
)

func main() {
	cfg := otlptracehttp.RetryConfig{
		Enabled:         true,
		InitialInterval: 50 * time.Millisecond,
		MaxInterval:     200 * time.Millisecond,
		MaxElapsedTime:  1 * time.Second,
	}

	opt := otlptracehttp.WithRetry(cfg)
	client := otlptracehttp.NewClient(
		opt,
		otlptracehttp.WithEndpoint("localhost:4318"),
		otlptracehttp.WithInsecure(),
	)

	fmt.Printf("client created: %v\n", client != nil)
	_ = context.Background()
}

{
  "schemaVersion": 1,
  "goal": "verify otlptracehttp.WithRetry in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp@v1.43.0"
  ],
  "symbols": [
    "otlptracehttp.WithRetry"
  ]
}

package main

import (
	"context"
	"fmt"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"sync/atomic"
	"time"

	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
	"go.opentelemetry.io/otel/sdk/trace/tracetest"
)

func main() {
	ctx := context.Background()
	span := tracetest.SpanStub{Name: "contract-span"}.Snapshot()
	spans := []sdktrace.ReadOnlySpan{span}

	// 1. Verify WithRetry enables retrying on transient HTTP 503 errors and eventually succeeds
	{
		var reqCount atomic.Int32
		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			count := reqCount.Add(1)
			if count == 1 {
				http.Error(w, "Service Unavailable", http.StatusServiceUnavailable)
				return
			}
			w.WriteHeader(http.StatusOK)
		}))
		defer server.Close()

		u, err := url.Parse(server.URL)
		if err != nil {
			panic(fmt.Sprintf("parse url: %v", err))
		}

		cfg := otlptracehttp.RetryConfig{
			Enabled:         true,
			InitialInterval: 10 * time.Millisecond,
			MaxInterval:     50 * time.Millisecond,
			MaxElapsedTime:  1 * time.Second,
		}

		exp, err := otlptracehttp.New(
			ctx,
			otlptracehttp.WithEndpoint(u.Host),
			otlptracehttp.WithInsecure(),
			otlptracehttp.WithRetry(cfg),
		)
		if err != nil {
			panic(fmt.Sprintf("create exporter: %v", err))
		}
		defer exp.Shutdown(ctx)

		if err := exp.ExportSpans(ctx, spans); err != nil {
			panic(fmt.Sprintf("expected success after retry, got error: %v", err))
		}

		if count := reqCount.Load(); count != 2 {
			panic(fmt.Sprintf("expected exactly 2 requests (1 fail + 1 success), got %d", count))
		}
	}

	// 2. Verify WithRetry with Enabled: false does NOT retry transient HTTP 503 errors
	{
		var reqCount atomic.Int32
		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			reqCount.Add(1)
			http.Error(w, "Service Unavailable", http.StatusServiceUnavailable)
		}))
		defer server.Close()

		u, err := url.Parse(server.URL)
		if err != nil {
			panic(fmt.Sprintf("parse url: %v", err))
		}

		cfg := otlptracehttp.RetryConfig{
			Enabled: false,
		}

		exp, err := otlptracehttp.New(
			ctx,
			otlptracehttp.WithEndpoint(u.Host),
			otlptracehttp.WithInsecure(),
			otlptracehttp.WithRetry(cfg),
		)
		if err != nil {
			panic(fmt.Sprintf("create exporter: %v", err))
		}
		defer exp.Shutdown(ctx)

		err = exp.ExportSpans(ctx, spans)
		if err == nil {
			panic("expected export error when retry is disabled, got nil")
		}

		if count := reqCount.Load(); count != 1 {
			panic(fmt.Sprintf("expected exactly 1 request without retry, got %d", count))
		}

		if !strings.Contains(err.Error(), "retry-able request failure") {
			panic(fmt.Sprintf("expected retry-able request failure error, got: %v", err))
		}
	}

	// 3. Verify WithRetry stops retrying and returns an error when MaxElapsedTime is exceeded
	{
		var reqCount atomic.Int32
		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			reqCount.Add(1)
			http.Error(w, "Service Unavailable", http.StatusServiceUnavailable)
		}))
		defer server.Close()

		u, err := url.Parse(server.URL)
		if err != nil {
			panic(fmt.Sprintf("parse url: %v", err))
		}

		cfg := otlptracehttp.RetryConfig{
			Enabled:         true,
			InitialInterval: 10 * time.Millisecond,
			MaxInterval:     20 * time.Millisecond,
			MaxElapsedTime:  50 * time.Millisecond,
		}

		exp, err := otlptracehttp.New(
			ctx,
			otlptracehttp.WithEndpoint(u.Host),
			otlptracehttp.WithInsecure(),
			otlptracehttp.WithRetry(cfg),
		)
		if err != nil {
			panic(fmt.Sprintf("create exporter: %v", err))
		}
		defer exp.Shutdown(ctx)

		err = exp.ExportSpans(ctx, spans)
		if err == nil {
			panic("expected error after retry exhaustion, got nil")
		}

		if count := reqCount.Load(); count < 2 {
			panic(fmt.Sprintf("expected multiple retry attempts before timeout, got %d", count))
		}
	}

	fmt.Println("CONTRACT_VERIFIED: otlptracehttp.WithRetry behaves as expected")
}