How to Fix: Dealing with "java.lang.OutOfMemoryError: PermGen space" error
PermGen space error in Hibernate/JPA + IceFaces/JSF application on Tomcat 6 and JDK 1.6.
📋 Table of Contents
The "java.lang.OutOfMemoryError: PermGen space" error occurs when the Java Virtual Machine (JVM) runs out of memory for a specific area called the permanent generation, also known as PermGen space.
Why You Are Getting This Error
- The PermGen space is used to store metadata such as class definitions, method tables, and other data that does not fit in the heap memory. When this space becomes full, it can lead to an OutOfMemoryError.
Best Solutions to Fix It
Method 1: Increasing PermGen Size
- Step 1: Open the Tomcat configuration file (usually located in the conf directory) and add the following line to increase the PermGen size: -Xmx512m -XX:MaxPermSize=512m
Method 2: Using a Larger Heap Size
- Step 1: Open the Tomcat configuration file and add the following line to increase the heap size: -Xmx1024m -XX:MaxPermSize=512m
Wrapping Up
By increasing the PermGen size or using a larger heap size, you can prevent the OutOfMemoryError and ensure that your application runs smoothly.
❓ Frequently Asked Questions
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