⚠️ How I Diagnosed and Fixed a Silent NumPy Upgrade That Broke My Databricks Pipelines

Jul 10, 2025 · 3 min read · Background Recently, one of our critical ADF production pipelines failed unexpectedly with the following error from the Databricks notebook activity: "Could not reach driver of cluster 0619-120457-7gl1w8rb." The notebook had been working fine earli...