Batch Processing

Data Thinking Notes

Dec 21, 2022 · Big Data

Why Your Spark Batch Job Fails: Memory Limits, Data Skew, and Practical Fixes

This article examines a recurring Spark batch task failure caused by OutOfMemory errors and data skew, details the investigation steps—including increasing executor memory, raising parallelism, and analyzing shuffle metrics—and proposes solutions such as data validation, filtering oversized keys, and memory adjustments.