Sentry SDK 20.10.0 change: breadcrumbs omitted in containerized CI lacking HTTP request context

Direct Answer

Enable attach_stacktrace globally for all SDKs used in your CI pipeline. Use Sentry.addBreadcrumb to record CI-specific milestones. Manually setting the request context via Sentry.configureScope will not restore automatic breadcrumb capture because the SDK’s auto-breadcrumb hooks are tied to framework request lifecycles, not just the presence of a context object.

Why This Happens (Likely Explanation)

In containerized CI runners there is no HTTP request lifecycle, so the SDK’s default breadcrumb integration (which watches framework middleware) never runs. Starting with version 20.10.0 the attach_stacktrace option became more conservative, omitting stacktraces when no request context is detectable. Consequently both automatic breadcrumbs and stacktraces can disappear.

Confirmed Facts

• Sentry SDKs buffer breadcrumbs in memory and flush them on request teardown or explicit flush() call.
• Without a request teardown (common in short‑lived CI containers) the buffer may never be sent unless you flush synchronously.
• Enabling attach_stacktrace forces the SDK to include a stacktrace with every event, independent of request context.

Steps to Restore Visibility

1. Enable global stacktraces: In your Sentry init, set attach_stacktrace: true (or the language‑specific equivalent).
2. Add manual breadcrumbs: Insert Sentry.addBreadcrumb calls at key CI steps (e.g., "Build started", "Dependencies installed", "Test suite started").
3. Flush before exit: Ensure the CI script calls the SDK’s flush method (e.g., Sentry.flush() or sentry_sdk.flush()) and waits for it to complete before the container terminates.

Verification

Run a test CI job that throws an exception, then inspect the resulting Sentry issue. Verify that the event includes a stacktrace and that the manual breadcrumbs appear in the Breadcrumbs tab.

Missing diagnostic detail: To give the exact flush call for your runtime, please specify which language SDK you are using (e.g., Python, JavaScript, Java).