Software⏱️ 2 min read📅 2026-05-31

How to Fix: Error java.lang.OutOfMemoryError: GC overhead limit exceeded

GC overhead limit exceeded error in JUnit tests means the garbage collector is taking too long to free memory, causing an OutOfMemoryError.

Quick Answer: Increase heap size or use a smaller test dataset to reduce GC overhead.

The java.lang.OutOfMemoryError: GC overhead limit exceeded error occurs when the Java Garbage Collector (GC) is unable to clean up memory efficiently due to excessive garbage collection cycles. This can be caused by various factors, including large amounts of memory-intensive data structures, inefficient algorithms, or inadequate heap size.

🛑 Root Causes of the Error

  • Large amounts of memory-intensive data structures, such as arrays or matrices.

🛠️ Step-by-Step Verified Fixes

Method 1: Heap Size Adjustment

  1. Step 1: Increase the heap size for your Java application.

Method 2: Memory Profiling and Optimization

  1. Step 1: Use a memory profiling tool to identify memory-intensive components in your application.

✨ Wrapping Up

To resolve the java.lang.OutOfMemoryError: GC overhead limit exceeded error, you can try adjusting the heap size for your Java application or use memory profiling tools to identify and optimize memory-intensive components.

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