Скачать или смотреть Resolving the java.lang.OutOfMemoryError: GC overhead limit exceeded Error in Maven with FindBugs

Discover how to tackle the `java.lang.OutOfMemoryError: GC overhead limit exceeded` when running FindBugs in Maven. Learn about memory settings and configuration tweaks for smooth builds.
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Resolving the java.lang.OutOfMemoryError: GC overhead limit exceeded Error in Maven with FindBugs

If you've encountered the frustrating java.lang.OutOfMemoryError: GC overhead limit exceeded error while running FindBugs during your Maven build, you are not alone. This error typically occurs when the Java Virtual Machine (JVM) spends too much time performing garbage collection (GC) with not enough memory left to fulfill the program’s requirements. Let's break down the possible causes and how to resolve them effectively.

Understanding the Problem

This error signifies that the JVM is running low on memory and is unable to produce enough free space after running garbage collection. The error often reveals itself in situations where:

The project has increased in size or complexity, especially after adding new code.

The configuration settings for memory allocation are inadequate to handle the tasks being performed, such as static analysis with FindBugs.

In our scenario, the user noted that the problem arose after adding certain new code to their project, causing the build to fail. They attempted to modify the <effort> setting in their FindBugs configuration but faced the same issue, and unfortunately, they couldn't modify the JVM parameters to provide more memory.

Steps to Resolve the Issue

1. Adjust Memory Settings in Maven

Fortunately, there is a way to specify a larger heap size for the forked JVM processes that Maven uses. By modifying your POM file, you can allocate more memory for the FindBugs analysis. Here’s how to do it:

Open your pom.xml file.

Locate the FindBugs plugin configuration section. It typically looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Add the <maxHeap> configuration inside the <configuration> tag like this:

[[See Video to Reveal this Text or Code Snippet]]

In this setup, 1024 represents the maximum heap size in megabytes that the FindBugs process can utilize. Adjust this value as needed based on the resources available to your machine.

2. Understanding the Impact of Changes

Increasing the heap size can significantly improve the performance of the FindBugs analysis, especially in larger projects or those containing complex code. By providing more memory, you can help mitigate the risk of hitting the OutOfMemoryError during analysis.

3. In Case of Memory Constraints

If your organization restricts modifying JVM parameters or if increasing memory still results in failures, consider reviewing the code changes you've added recently. Sometimes, subtle issues in the code can exacerbate memory usage during static analysis. However, keep in mind that FindBugs should ideally report those as warnings or errors rather than causing the JVM to crash.

Conclusion

While running into the java.lang.OutOfMemoryError: GC overhead limit exceeded message during a Maven build can be daunting, understanding its implications and managing memory settings effectively can lead to a resolution. By configuring the maximum heap size in the FindBugs plugin, you can alleviate your project's memory issues, allowing for successful builds. Remember to adjust these settings based on your project needs and system capabilities.

So, the next time you encounter this error, try the above steps effectively, and hopefully, you will find a resolution that works for you! Happy coding!