N Kaushik

How to fix java.lang.OutOfMemoryError GC overhead limit exceeded error

April 28, 2022

How to fix java.lang.OutOfMemoryError: GC overhead limit exceeded error:

I was facing this error while building an Android project. This error might appear on building a react native, Android, or Flutter project. GC stands for Garbage collector. This error is thrown if the Garbage collector spents too much time.

Error:: D8: java.lang.OutOfMemoryError: GC overhead limit exceeded

FAILURE: Build failed with an exception.

*What went wrong
Execution failed for task ':app:mergeExtDexDebug'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.

java.lang.OutOfMemoryError exception

What is garbage collector:

Garbage collector removes unused objects from memory. If the app creates a lot of objects, garbage collector runs to clean the memory. Garbage collector consumes a lot of CPU. Also, frequent running of garbage collector might pause the app.

Cause of this error:

This is an OutOfMemoryError. This error is thrown if too much time is spent by the garbage collector on cleaning up the memory. If it can only recover less than 2% of heap space and if more than 98% of time is spent on garbage collection, it will throw this OutOfMemoryError exception.

The heap is small in size. So, it will prevent the app from running for a long time with little to no progress on garbage collection.

Fix for this issue:

This issue can be fixed by editing the android/gradle.properties file. We have to add the below property:


If gradle.properties file is not there in the android folder, you can create it.

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