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

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?.

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)