Engineering Logs for Troubleshooting & Debugging
Problem – HAProxy traffic imbalance during a blue‑green deployment During a scheduled blue‑green rollout of a new service version, the production HAProxy 2.8 front‑end observed a ~40 % increase in query latency. The spike appeared only after the first batch of green servers was added to the blue_green backend and persisted until the rollout completed. Typical … Read more
Problem – ONNX Runtime Inference Fails After CI/CD Deployment During a routine CI/CD rollout, newly built ONNX model containers are deployed to a Kubernetes cluster. After the deployment completes, API calls that should hit the onnx-runtime service return HTTP 502/504 errors and the ONNX Runtime logs show Failed to load model: file not found. The … Read more
Problem – ConfigMap/Secret Mount Errors in a Multi‑Region Haystack Deployment In a production Haystack deployment spanning multiple AWS regions, pods repeatedly fail during initialization with messages such as: Error: “failed to sync config: open /etc/haystack/config.yaml: no such file or directory” MountVolume.SetUp failed for volume “config” : hostPath type check failed: path /etc/haystack does not exist … Read more
Problem – Webhook Timeout During Canary Deployment of Meta LLaMA During a canary rollout on an Amazon EKS cluster, 10 % of traffic was routed to a new version of the Meta LLaMA inference service. The service invokes an external monitoring endpoint via a REST webhook after each inference request. Operators observed a surge in failed … Read more