Data Management and Analytics

Problem: A client planned a rolling patch upgrade of a 5-node Apache Cassandra 4.1.x cluster running on cloud VMs, combined with a minor RHEL 9.x OS update. They submitted their runbook for review and asked whether the OS update affected JVM and Python support, whether there were known compatibility issues, and whether the plan carried […]

Problem: The client experienced an intermittent disappearance of a critical Apache Airflow DAG — Dag-Factory. The DAG would appear in the Airflow UI and CLI, then vanish from the DagBag and UI for periods of time before reappearing. Each disappearance caused pipeline failures (notably the need to re-trigger the BONG initial load), interrupting production workflows. […]