ERROR: R8: java.lang.OutOfMemoryError: Java heap space

[damianzdunekinertia]

If you are looking for help, please confirm the following...

• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

1. Upgrade to the latest version (8.6) of Gradle in the gradle-wrapper.properties file and the Android Gradle plugin (8.4.0) in the android/build.gradle file as advised on that page.
2. Additionally upgrade to the latest Flutter SDK (3.22.2)
3. Try various configuration increasing Java heap space in the gradle.properties, like

org.gradle.jvmargs=-Xmx4096m

or

org.gradle.daemon=true
org.gradle.parallel=true
org.gradle.configureondemand=true
org.gradle.jvmargs=-Xmx4096m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

Expected results

Android build passes on M1 machine as I can't change it when using free plan.

Actual results

Android build fails with error message:

java.lang.OutOfMemoryError: Java heap space
ERROR: R8: java.lang.OutOfMemoryError: Java heap space

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:minifyReleaseWithR8'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.R8Task$R8Runnable
   > Compilation failed to complete

Build id (optional)

668fd087612f74af828bfd11

[himesh-cm]

Hey @damianzdunekinertia,
Can you try by modifying your android/gradlew file by adding this command? Let me know, how it goes.​

​exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain -Dorg.gradle.jvmargs="-Xmx4096m" "$@"

[damianzdunekinertia]

Hi @himesh-cm, thank you for your answer.

Unfortunately, updating gradlew file doesn't help. It produces Unknown command-line option '-X'. error (both on my local machine and CodeMagic). The latest build number is 669101f8a9867518374b0229

I tried the different solutions (like below) similar to yours but it didn't work as well – at least on my local machine.

DEFAULT_JVM_OPTS="-Xmx4096m"

eval "set -- $(
    printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
    xargs -n1 |
    sed 's~[^-[:alnum:]+,./:=@_]~\\&~g;' |
    tr '\n' ' '
)" '"$@"'

exec "$JAVACMD" "$@" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain

I'm attaching my gradlew file.

[damianzdunekinertia]

@himesh-cm do you have any idea why I've got Unknown command-line option '-X' error?

I'd be grateful for any suggestion how to make my build work.

[himesh-cm]

Hey @damianzdunekinertia

After checking your gradlew file, please add the below snippet

set -- "-Dorg.gradle.jvmargs=-Xmx4096m" "$@"

exec "$JAVACMD" "$@" 

instead of
exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain -Dorg.gradle.jvmargs="-Xmx4096m" "$@"

Please try it locally first and let me know, if you run into any issues.

[damianzdunekinertia]

Thank you @himesh-cm, it worked!

[himesh-cm]

Super, While I’m closing our discussion for now, if you have any other questions or suggestions, feel free to reply back or start a new discussion anytime. Have a nice day!

[Neelansh-ns]

Different gradle.properties take priority.
More here: https://docs.gradle.org/current/userguide/build_environment.html#:~:text=JAVA_HOME-,Priority%20for%20configurations,-When%20configuring%20Gradle

So modifying the $HOME/.gradle gradle.properties should do the trick.

Or GRADLE_OPTS can come in handy.

GRADLE_OPTS="-Dorg.gradle.jvmargs=$GRADLE_JVMARGS $GRADLE_OPTS"
echo "export GRADLE_OPTS=\"$GRADLE_OPTS\"" >> $HOME/.bash_profile

[hnvn]

I got this issue too. I tried to edit gradlew file and setup GRADLE_OPTS, nothing works for me

[hnvn]

I got it worked out finally by creating gradle.properties file inside $HOME/.gradle. BTW, editing gradlew not working for me because I modified it locally and this file is not uploaded to my git repo

[ChauCM]

What does your script look like when creating gradle.properties? After making one, my Java version changed from 17 to 11

Edited: Script for those needed

    - name: update gradle.properties in $HOME/.gradle
      script: |
        # Create or overwrite gradle.properties with new settings
        echo "org.gradle.jvmargs=-Xmx4096m" > $HOME/.gradle/gradle.properties
        echo "org.gradle.java.home=/Library/Java/JavaVirtualMachines/zulu-17.jdk/Contents/Home" >> $HOME/.gradle/gradle.properties

        # Show updated gradle.properties
        echo "Updated gradle.properties:"
        cat $HOME/.gradle/gradle.properties