JavaScript heap out of memory while running a Nodejs app on App Platform

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

I ran into an issue with my latest build/deployment. I had a successful build locally on my machine. Can you help me on how to solve this?

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Sri Charan Madhavapeddi
DigitalOcean Employee
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August 20, 2021
Accepted Answer


In app platform you only have 8gb of disk space + RAM. If either of those or both combined go over 8gb the build will fail with the out of memory errors you are seeing.

Yes we agree to your query but since the heap memory is sort of dynamic and increases during the runtime.

If this is a react or similar app you may need to add a memory limit to the build script something like and also refer to the below options.

react-scripts --max_old_space_size=2048 build

You may need to add 2 environment variables with BUILD_SCOPE:

  1. Key: NODE_OPTIONS Value: --max-old-space-size=4096

  2. Key: GENERATE_SOURCEMAP Value: false

Hope this helps!

Cheers, Sri Charan

Appreciate this question is a little old but ran into the same issue, and this post comes up when searched.

I fixed this by adding the following as an Environment Variable within the relevant App service settings.

NODE_OPTIONS --max_old_space_size=4096

This was a sufficient increase for my build to work.

Hope this helps someone else experiencing failed builds.

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