▸case-01 Our production Kubernetes cluster is experiencing widespread CrashLoopBackOff errors across several microservices following a recent deployment. I need a structured incident response guide that walks through root cause analysis for container crashes, listing concrete investigation steps and verification commands to isolate whether it's an OOM issue, configuration error, or network failure. | fail→fail | 26,746 | 30,670 | +15% | 1 | 1 | 0% | 4,493 | 5,233 | +16% | 0 | 0 | — |
▸case-02 We are seeing a sudden spike in 504 Gateway Timeouts and elevated API latency on our cloud infrastructure, likely related to database connection pooling or resource exhaustion. Please generate a step-by-step diagnostic plan detailing how to analyze performance bottlenecks across the application and database tiers, including verification steps to ensure system stability post-remediation. | fail→fail | 25,309 | 55,648 | +120% | 1 | 1 | 0% | 3,760 | 1,282 | -66% | 0 | 0 | — |
▸case-03 Our automated deployment pipeline failed unexpectedly during the staging rollout stage with transient network timeouts and permission errors on cloud resource provisioning. Can you provide a comprehensive troubleshooting checklist and actionable remediation plan to diagnose pipeline failures, check cloud permissions, and confirm build pipeline recovery? | fail→fail | 23,786 | 24,376 | +2% | 1 | 1 | 0% | 3,995 | 3,866 | -3% | 0 | 0 | — |
▸case-04 Internal microservices on our AWS VPC running CoreDNS are occasionally failing with SERVFAIL when trying to resolve external third-party API endpoints. The temptation is to immediately double the CoreDNS replica count without checking upstream resolver limits. I need a troubleshooting guide to diagnose the root cause and verify resolution. | fail→fail | 26,680 | 30,402 | +14% | 1 | 1 | 0% | 4,741 | 4,939 | +4% | 0 | 0 | — |
▸case-05 Our PostgreSQL 15 database running on AWS RDS has experienced sudden CPU spikes and query queuing. Developers suspect an unindexed query, but the database admin thinks it might be row lock contention from a concurrent batch job. Produce an incident diagnostic procedure and post-fix validation plan. | fail→fail | 30,678 | 22,386 | -27% | 1 | 1 | 0% | 4,639 | 4,731 | +2% | 0 | 0 | — |
▸case-06 A Spring Boot microservice running in Linux containers on Docker Swarm suffers from progressive memory growth, resulting in kernel OOM kills every 48 hours. The team wants to increase the container memory limit immediately. Provide a systematic debugging checklist for Java heap vs off-heap memory issues and verification steps. | fail→fail | 28,175 | 24,030 | -15% | 1 | 1 | 0% | 3,905 | 4,351 | +11% | 0 | 0 | — |
▸case-07 During a GitHub Actions deployment workflow, a Terraform run was killed mid-execution due to a runner timeout, leaving the S3 remote state backend locked with a DynamoDB lock ID. Engineers are tempted to force-unlock without checking state integrity. Provide a step-by-step remediation guide. | fail→fail | 17,887 | 19,010 | +6% | 1 | 1 | 0% | 2,917 | 3,346 | +15% | 0 | 0 | — |
▸case-08 Prometheus alert manager raised TargetDown for a scrape job monitoring Kubernetes ingress controllers. Operators suspect network policy blocking port 10254. Provide a diagnostic protocol to trace scrape failure across pod endpoints and verify scrape recovery. | fail→fail | 19,811 | 18,520 | -7% | 1 | 1 | 0% | 3,520 | 3,745 | +6% | 0 | 0 | — |
▸case-09 An Elasticache Redis cluster experienced automatic primary failover, causing a cascade of application connection timeouts. The quick assumption is to double connection timeouts in client code. Create a troubleshooting workflow to investigate replica lag, memory fragmentation, and verify failover resilience. | fail→fail | 25,070 | 25,518 | +2% | 1 | 1 | 0% | 3,773 | 4,583 | +21% | 0 | 0 | — |
▸case-10 Applications communicating across an Istio service mesh encounter intermittent 503 Service Unavailable errors with response flag UC. Developers assume it's an application crash. Provide a debugging plan for Envoy proxy logs and sidecar configurations. | fail→fail | 18,742 | 19,249 | +3% | 1 | 1 | 0% | 3,284 | 3,602 | +10% | 0 | 0 | — |
▸case-11 An Apache Kafka consumer group processing payment events keeps triggering continuous rebalances, halting event processing. The team wants to increase session timeout to an arbitrary high value. Provide a root cause analysis procedure for consumer lag and heartbeat timeouts. | fail→fail | 23,471 | 18,579 | -21% | 1 | 1 | 0% | 3,752 | 3,605 | -4% | 0 | 0 | — |
▸case-12 A Linux build server hosting Docker daemon ran out of root disk space, breaking all active CI jobs. Ops wants to blindly delete /var/lib/docker. Create a safe disk space incident recovery procedure and long-term fix verification. | fail→fail | 18,047 | 19,917 | +10% | 1 | 1 | 0% | 3,127 | 3,331 | +7% | 0 | 0 | — |
▸case-13 Users report seeing outdated JavaScript bundles after a production deployment via AWS CloudFront and S3. Junior devs suggest executing a global invalidation /* on every deployment. Provide a diagnostic procedure for HTTP cache headers and invalidation strategy. | fail→fail | 20,395 | 17,732 | -13% | 1 | 1 | 0% | 3,376 | 3,614 | +7% | 0 | 0 | — |
▸case-14 A StatefulSet pod in Kubernetes is stuck in ContainerCreating with events showing FailedAttachVolume for AWS EBS PVC. The quick fix being attempted is deleting the pod repeatedly. Provide a diagnostic guide for volume attachment locks and node affinity. | fail→fail | 21,575 | 21,146 | -2% | 1 | 1 | 0% | 3,161 | 3,971 | +26% | 0 | 0 | — |
▸case-15 An Elasticsearch 8 cluster status turned Yellow due to unassigned replica shards following a node restart. Administrators are considering forcing primary shard allocation. Provide a diagnostic workflow to identify shard assignment failures and verify cluster health. | fail→fail | 16,920 | 20,058 | +19% | 1 | 1 | 0% | 3,078 | 3,762 | +22% | 0 | 0 | — |
▸case-16 An NGINX reverse proxy is dropping client connections during traffic spikes with error log entry worker_connections are not enough. Operations wants to arbitrarily set worker_connections to 100000 without checking system file limits. Create a diagnostic and remediation guide. | fail→fail | 20,328 | 21,601 | +6% | 1 | 1 | 0% | 3,688 | 4,344 | +18% | 0 | 0 | — |
▸case-17 A HashiCorp Vault client application fails to renew its access token periodically, resulting in permission denied errors after 24 hours. Developers want to switch to a root token. Provide a systematic troubleshooting plan for Vault ACL policies and token TTLs. | fail→fail | 21,653 | 18,084 | -16% | 1 | 1 | 0% | 3,497 | 3,599 | +3% | 0 | 0 | — |
▸case-18 A Google Cloud Run service fails to query a BigQuery dataset with 403 Forbidden Access Denied. The developer wants to grant roles/owner to the service account. Provide a diagnostic procedure to audit IAM roles and verify least-privilege access. | fail→fail | 13,873 | 16,761 | +21% | 1 | 1 | 0% | 2,584 | 3,010 | +16% | 0 | 0 | — |
▸case-19 A Linux database host exhibits high iowait CPU usage (>40%), slowing down application transactions. The team is considering migrating to a larger instance immediately. Provide an investigation plan using standard Linux performance tools and validation steps. | fail→fail | 25,392 | 21,771 | -14% | 1 | 1 | 0% | 3,511 | 3,403 | -3% | 0 | 0 | — |
▸case-20 We are starting a brand new microservices project and need to design a production-grade infrastructure architecture on AWS EKS from scratch. Can you draft a complete architecture blueprint specifying multi-AZ subnet configurations, VPC endpoints, and Terraform module structures? | pass→pass | 51,357 | 41,135 | -20% | 1 | 1 | 0% | 8,237 | 7,426 | -10% | 0 | 0 | — |
▸case-21 Our software engineering department is standardizing its development workflow. Please author a comprehensive Git branching strategy document and pull request policy guidelines for feature, release, and hotfix branches. | pass→pass | 24,349 | 24,016 | -1% | 1 | 1 | 0% | 4,156 | 4,576 | +10% | 0 | 0 | — |
▸case-22 We are writing a Product Requirements Document (PRD) for an internal developer platform portal that allows developers to self-serve cloud environments. Please write the functional requirements, user personas, and acceptance criteria for this portal. | pass→pass | 18,237 | 29,566 | +62% | 1 | 1 | 0% | 2,974 | 4,677 | +57% | 0 | 0 | — |