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chore(deno): Note that OTel setup defaulting to on is unintentional #26310

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isaacs merged 1 commit into from
Nov 11, 2026
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chore(deno): Note that OTel setup defaulting to on is unintentional #26310

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2 changes: 2 additions & 0 deletions packages/deno/src/sdk.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,8 @@ function _init(options: DenoOptions, getDefaultIntegrationsImpl: (options: Optio

// Set up OpenTelemetry compatibility to capture spans from libraries using @opentelemetry/api
// Note: This is separate from Deno's native OTEL support and doesn't capture auto-instrumented spans
// TODO(v12): Default this to `false` (opt-in, like Cloudflare). Defaulting to `true` was an oversight from #17445,
// not a deliberate choice, but flipping it is a breaking change.
if (options.enableOpenTelemetrySetup ?? true) {
setupOpenTelemetryTracer();
}
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