CodingLevel 6

Dependencies and deploys

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StatusFormatCompany style
Easy
Error rate spike after deployOn-call incidentOn-call incident15 minInvalid configuration blocks startupOn-call incidentOn-call incident15 minEmails stop sending silentlyOn-call incidentOn-call incident15 minShipping rates fail after a vendor retires an API versionOn-call incidentOn-call incident15 minSome photo uploads fail since this morningOn-call incidentOn-call incident15 min
Medium
Cache stampede after rolling restartOn-call incidentOn-call incident30 minCertificate expiry at scaleOn-call incidentOn-call incident30 minCanary blind to currencyOn-call incident · Stripe styleStripe styleOn-call incidentStripe style30 minTimeout reduction triggers retry stormOn-call incidentOn-call incident30 minStale personalized content after rollbackOn-call incidentOn-call incident35 minmTLS certificate expiredOn-call incidentOn-call incident30 minPayment provider degradationOn-call incident · Stripe styleStripe styleOn-call incidentStripe style30 minJVM warmup latency on deployOn-call incidentOn-call incident35 minVolumetric DNS amplificationOn-call incidentOn-call incident35 minJobs transcode multiple times simultaneouslyOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style30 minRegional error rate at 100%On-call incident · Netflix styleNetflix styleOn-call incidentNetflix style35 minHome screen returns 500On-call incident · Netflix styleNetflix styleOn-call incidentNetflix style30 min
Hard
Retry amplification during vendor outageOn-call incident · Stripe styleStripe styleOn-call incidentStripe style35 minEnum deserialization fails during rolloutOn-call incidentOn-call incident40 minRollback blocked by schema mismatchOn-call incidentOn-call incident45 minSidecar v2 cannot resolve upstreamOn-call incidentOn-call incident40 minDNS split-brain after resolver migrationOn-call incidentOn-call incident35 minRetry storm amplifies upstream slowdownOn-call incidentOn-call incident40 minAuthoritative DNS under DDoSOn-call incidentOn-call incident40 minRegional object storage degradation cascadesOn-call incident · Amazon styleAmazon styleOn-call incidentAmazon style40 minDeadline not propagated upstreamOn-call incident · Google styleGoogle styleOn-call incidentGoogle style45 minStale DNS cache after pod rescheduleOn-call incidentOn-call incident40 minDNS exfiltration covert channel detectedOn-call incidentOn-call incident45 minRabbitMQ redelivery storm from timeoutsOn-call incidentOn-call incident40 min