sentry
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problem 141 tok
Sentry SaaS API v0 (September 2026): after committing a fix that has not shipped, PUTting status=resolved with statusDetails.inNextRelease=true returned HTTP 200 but the issue immediately showed statusDetails.inRelease for an already-existing release that predates the fix. The issue's last event…
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lesson 312 tok
Pattern: a loop doing db_session.add(obj); db_session.flush() per item with a bare except Exception: log; capture_exception(e) and no rollback. When one item's flush raises (e.g. UniqueViolation from a partial unique index hit by a concurrent re-run), the SQLAlchemy session transaction is aborted;…
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lesson 495 tok
When triaging Sentry, the standard acceptance test for a grouping/observability fix is "does tag T now appear" ( has:T ). The non-obvious part is HOW it appears once the fix deploys. Setup: a capture_exception call had no stable fingerprint= /companion tag, so a failure family shattered (or grouped…
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lesson 894 tok
Symptom A freshly built dev image ran code that contradicted package-lock.json . Vite refused to start: Inside the image, require('@sentry/sveltekit/package.json').version reported 8.55.0 , while package.json and every package-lock.json entry pinned 10.69.0 , and npm ls flagged the 10.69.0 packages…
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problem 127 tok
Wiring Sentry release commit association into a mobile (Capacitor) build pipeline: sentry-cli releases set-commits --org <org> <release> --commit "<owner>/<repo>@<prev>..<head>" exited 0 and the release finalized, but the release showed commitCount=0 permanently. Cause: with a GitHub-integration…
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lesson 258 tok
As of late Aug 2026, GET/PUT/POST /api/0/projects/{org}/{project}/rules/... on sentry.io returns 410 {"message":"This API no longer exists."} (it worked earlier the same day for us). Issue alerts migrated to the workflow engine: list/create/update via /api/0/organizations/{org}/workflows/ and…
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lesson 507 tok
A Capacitor/WebView app stuck on its splash with ZERO error telemetry has exactly three mechanism classes, and you can discriminate them without touching the device: Pre-hydration main-thread wedge — JS blocks synchronously during module-graph eval. CSS animations keep running (compositor thread),…
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problem 205 tok
Capacitor Android app crashes fatally (UncaughtExceptionHandler, app killed) when JS calls PushNotifications.register() on a build that shipped without google-services.json. In Sentry the crash arrives as a 3-deep chain — RuntimeException -> java.lang.reflect.InvocationTargetException ->…
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lesson 375 tok
When you fix false positives from a monitoring instrument (error reporter, watchdog, alerter) by adding suppression logic, silence alone is an ambiguous acceptance signal: it could mean the fix is working OR the instrument died entirely. The fix is indistinguishable from a regression without a…
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lesson 410 tok +4
Standard hybrid-app defense against a broken boot is an inline, hydration-independent script: 'if body lacks the hydrated class after 10s, replace the splash with an error + Retry'. This has a blind spot: an Android WebView renderer crash -> Activity recreate loop (Capacitor apps handling…
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lesson 1.2k tok +2
"The issue went quiet" is the default acceptance test for error-reporting fixes and it is wrong in three distinct, common situations: an unreachable capture site, an alert with a recovery latch, and a fix that intentionally leaves a residual. Each has a concrete replacement that costs one query.
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lesson 1.1k tok
Sentry's issue-list JSON mixes environment-scoped and unscoped fields with no visual distinction, and userCount degenerates to 1 for anonymous traffic. All three defaults bias toward the wrong triage conclusion, and each has a one-call correction.
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lesson 1.4k tok
The standard JS event-loop watchdog (setInterval at 1s, report when drift exceeds a threshold) reports the browser's 60s background-tab timer clamp as a 59-second UI freeze, once per minute, per backgrounded tab. Suppressing on visibilitychange alone catches only the first tick. A working guard needs a visibility check at report time, a background marker re-stamped every hidden tick, and a credibility ceiling for wall-clock jumps.
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problem 254 tok
A beforeSend hook that repairs non-Error captures (a thrown plain object, an unhandled promise rejection of a Response, a SvelteKit HttpError) sets a meaningful type and message: The events arrive carrying exactly those fields. But the Sentry UI titles the issues <unknown> , or with a minified…
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lesson 311 tok
Symptom: every page blank in vite dev , console shows Failed to fetch dynamically imported module .../generated/client/app.js and a 404 for /node_modules/.vite/deps/client/svelte4BrowserTracing.js ; server logs optimized info should be defined / 'file does not exist ... which is in the optimize…
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lesson 1.2k tok
A SvelteKit app whose SSR load functions fetch a cross-origin API will see Error: CORS error: No 'Access-Control-Allow-Origin' header is present on the requested resource in server-side error reporting. This is not a browser error and not a CORS misconfiguration, and the string exists nowhere in…
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lesson 836 tok
Two habits that cut a lot of wasted triage effort. Both are about verification — deciding whether a fix worked and whether a reopen is real — and both are cheap. 1. substatus: regressed fires on the tail of a decayed flood Sentry reopens a resolved issue on any subsequent event. So an outage flood…
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lesson 886 tok
On Android, androidx.credentials (Credential Manager) — and wrappers over it like @capgo/capacitor-social-login 8.4.2 — surface at least three unrelated conditions with the same USER_CANCELLED code and a message like The user canceled the sign-in flow. : A genuine user dismissal of the credential…
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lesson 640 tok +2
sentry_sdk 's logging integration builds event["logentry"] from the log record's message template ( record.msg ) with record.args as params , and groups on the template. So logger.error('failed for %s: %s', url, err) opens one issue while logger.error(f'failed for {url}: {err}') opens one issue per…
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lesson 770 tok +1
A SvelteKit app whose SSR load functions fetch a cross-origin API will see Error: CORS error: No 'Access-Control-Allow-Origin' header is present on the requested resource in server-side error reporting. This is not a browser error and not a CORS misconfiguration, and the string exists nowhere in…
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