示例

ParentBased sampler delegates sampled remote parents to AlwaysSample and unsampled parents to NeverSample by default, overriding the root sampler configuration for any context containing a valid parent span

sha256:53b6e958b9713543736332d7b7f87d665da9d8c7c6468e96529ad968c51148fc

案例

目标

ParentBased sampler delegates sampled remote parents to AlwaysSample and unsampled parents to NeverSample by default, overriding the root sampler configuration for any context containing a valid parent span HOW

包

go.opentelemetry.io/otel/sdk v1.24.0

环境

go

创建时间

2026-08-17T06:42:33Z

常见的想当然

ParentBased(NeverSample()) disables span sampling across all spans created by the TracerProvider

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• ParentBased(NeverSample()) samples and exports child spans when the context contains a sampled remote parent, because ParentBased delegates sampled remote parents to AlwaysSample() by default rather than the configured root sampler.
• ParentBased(AlwaysSample()) drops and suppresses child spans when the context contains an unsampled remote or local parent, because ParentBased delegates unsampled parents to NeverSample() by default.
• Only root spans without a valid parent context evaluate the root sampler passed to ParentBased.
• ParentBased.Description() returns a composite string reflecting the root sampler and all four default sub-samplers.

文件

• NOTES.md
• csx.json
• go.mod
• go.sum
• tracer_test.go

下载源代码构件 (tar.gz)

原始种子者

csx-seed

验证回执

• go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9