Setting JAVA_OPTS and JAVA_TOOL_OPTIONS in Gradle

Question

Running a large Gradle build (with JDK7) I receive two OutOfMemoryErrors:

Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "main"
Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "Test worker"

When I set the two environment variables below, the build runs through and works just fine:

export JAVA_OPTS="-Xmx2048m -XX:MaxPermSize=1024m"
export JAVA_TOOL_OPTIONS="-Xmx1024m -XX:MaxPermSize=1024m -Xms768m"
./gradlew test --stacktrace
...
Picked up JAVA_TOOL_OPTIONS: -Xmx1024m -XX:MaxPermSize=1024m -Xms768m
...

Is there a way to include those settings in gradle.properties or in build.gradle? If yes, what is the correct usage?

I already tried this in build.gradle:

allprojects {
    System.setProperty('JAVA_OPTS', "-Xmx2048m -XX:MaxPermSize=1024m")
    System.setProperty('JAVA_TOOL_OPTIONS', "-Xmx1024m -XX:MaxPermSize=1024m -Xms768m")
}

but that doesn't work.

Did you find my answer useful anyhow? – Opal May 09 '17 at 20:48 — Opal, May 09 '17 at 20:48

score 5 · Answer 1 · answered May 08 '17 at 10:26

5

Could you please try to create a gradle.properties file which should be located next to root build.gradle and will it with the following content:

org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=1024m

Another option is to set the required options via compileJava task, please see here and here.

Unfortunately no idea how JAVA_TOOL_OPTIONS can be set, it seems unsupported.

answered May 08 '17 at 10:26

Opal

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So the solution is `JAVA_TOOL_OPTIONS` is not supported and needs to be set in every CI/CD environment and developer's machine manually? – user3105453 May 10 '17 at 10:47
@user3105453, probaly yes. – Opal May 10 '17 at 10:50
5

I believe that `org.gradle.jvmargs` only affects the memory configuration of the Gradle daemon, not the JVM. – Gi0rgi0s Nov 24 '17 at 17:56
1

@Gi0rgi0s yes you are correct. its does not affect the forked JVM – arulraj.net Jan 29 '18 at 05:52

score 1 · Answer 2 · answered Jan 04 '18 at 00:32

1

From what I gather the gradlew is intended to be tweaked. So adding those environment variables in the gradlew script would be acceptable and the setting would be available in all CI environments.

answered Jan 04 '18 at 00:32

Sebastian Zubrinic

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Setting JAVA_OPTS and JAVA_TOOL_OPTIONS in Gradle

2 Answers2