Qunar Tech Salon

Dec 21, 2014 · Big Data

How to Prevent Java Heap Space Errors in Hadoop MapReduce by Managing Task Memory and Slots

This article outlines five essential steps to avoid Java heap space errors in Hadoop MapReduce by estimating memory consumption, verifying JVM availability and settings, limiting swap usage, and configuring instance slot numbers below the JobTracker's calculated values, ensuring stable cluster performance.