Maven import in Intellij IDEA runs out of memory on a large project

Question

Import of Maven project ends with

Exception java.lang.OutOfMemoryError: GC overhead limit exceeded

I've tried to define an environment variable: MAVEN_OPTS = -Xmx1g.
I've tried to add -Xmx1g to Maven VM options via Settings -> Build Tools -> Maven -> Runner.

Without success. What else can I do?

score 86 · Accepted Answer · edited Jun 15 '20 at 08:05

86

The solution is to set -Xmx1g (or more) in Maven VM options for importer (yes, it is a separate option!). Go to "Settings/Preferences -> Build Tools -> Maven -> Importing", and find the option there.

Read more on JVM heap size: (Q) What are the Xms and Xmx parameters when starting JVMs?.

edited Jun 15 '20 at 08:05

IamAshay

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answered Sep 30 '15 at 07:07

naXa stands with Ukraine

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If increasing memory limit doesn't help, check idea.log ([how to find logs?](https://intellij-support.jetbrains.com/hc/articles/207241085)) for errors related to Maven importing. – naXa stands with Ukraine Feb 26 '18 at 16:07
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Go to Preferences (on Mac) instead of Settings. :) – sarthakgupta072 Jun 04 '19 at 10:31
Can -Xmx be set to 16384? – R11G Jan 14 '20 at 19:19
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@R11G yes, you can set it to 16384, but note that 16384 bytes are just 16 kilobytes. set it to 16384k if you want 16 megabytes, or 16384m if you want 16 gigabytes. – naXa stands with Ukraine Jan 15 '20 at 09:27

score 7 · Answer 2 · edited Apr 20 '18 at 13:00

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if you want in idea, this config will be success. "Build process heap size (Mbytes)"

preference->Build,Execution,Deployment->Compiler:Build process heap size (Mbytes)

edited Apr 20 '18 at 13:00

Nihal

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answered Apr 20 '18 at 11:05

Wangshen Bi

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preference->Build,Execution,Deployment->Compiler:Build process heap size (Mbytes) – Wangshen Bi Apr 20 '18 at 11:07

Maven import in Intellij IDEA runs out of memory on a large project

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