Kiran Kumar

Staff Data Engineer

I build lakehouse platforms on Spark, Delta Lake, and Databricks — then write about the failures that no getting-started guide covers.

June 10, 2026

Your Spark Tests Aren't Flaky. They're Starving.

A wall of ConnectionRefusedError in CI, one real OOM, and two lines that fixed it. Here's the debugging chain that led there.

PySpark/Testing/CI/CD/Apache Spark
7 min read

Free eBook

Spark, Delta Lake, and Databricks in Production

Real Problems, Real Fixes, No Theory

Early Access — 3 chapters published

Always open to connecting with fellow engineers, swapping war stories, and talking shop about data platforms.