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You are configuring the max heap for the Gradle daemon and the one for the Kotlin compile daemon. But you show how a worker process is started, that is unrelated. If you get OOM during a task that uses a worker like test execution or similar, configure the memory for that task.

should I use something like this ?

tasks.withType(JavaExec) {
    jvmArgs = ['-Xms512m', '-Xmx512m']
}

No, you set it as property I think.

I did some search and I can only find solution as

org.gradle.jvmargs=-Xmx1024m

Sorry, that was misleading. Not Project property. Property on the task.

maxHeapSize = "20G"

I also did that but same issue

Well, is your problem a

JavaExec

task?

JavaExec

tasks have nothing to do with worker process.

I have problem with

:compileJava

then from looking at https://docs.gradle.org/current/dsl/org.gradle.api.tasks.compile.JavaCompile.html you should try something like

tasks.withType(JavaCompile) {
    options.fork {
        memoryMaximumSize = '29G'
    }
}

although that seems like a ludicrous size, try something more reasonable first

Thanks for help, I was able to fix the issue by adding this

tasks.withType<JavaCompile> {
    options.isFork = true
    options.fork("memoryMaximumSize" to "25G")
}