Engineering Logs for Troubleshooting & Debugging
Duplicate LangChain Pipeline Runs After Overlapping CronJob Schedules Problem In a production deployment, a LangChain agent consumes a high‑volume event stream (Kafka, Kinesis, etc.) and processes each event through a pipeline that writes results to a downstream store. The pipeline is triggered by a Kubernetes CronJob that runs every 5 minutes. After a recent schedule change, … Read more
Problem Three Kubernetes clusters (us‑east‑1, eu‑central‑1, ap‑southeast‑2) run identical CronJob manifests that trigger a batch inference worker every 5 minutes. The workers pull pending requests from a shared DynamoDB table and invoke the OpenAI GPT‑4o endpoint. After a recent deployment, the OpenAI API started returning 429 Too Many Requests errors, and the logs showed duplicate processing … Read more
Problem Description In a production Weaviate deployment several CronJob resources are used: Nightly backup (02:00) Index compaction (02:30) Data synchronization (every 15 minutes) Operators observed the following symptoms: Backup logs contain “Failed to acquire lock for backup”. Kubernetes controller logs show “CronJob is already running” for the index job. Occasional “Backoff limit exceeded” events after the … Read more