JVM heap size is not set correctly for Java actions

[rabbah]

Java actions run with no heap settings, regardless of the container's memory limit: https://github.com/apache/incubator-openwhisk/blob/master/core/javaAction/Dockerfile#L38

This will cause a reused Java action to eventually be killed because the GC may not get a chance to run.

>  docker run -m 64M -it javaaction bash
# java -XX:+PrintFlagsFinal -version 2>&1 | grep MaxHeapSize
    uintx MaxHeapSize                              := 1035993088                          {product}

That's ~1GB even though memory limit for container is 64M.

[jsanda]

Is something like this what you have in mind? run-java.sh is the default command for the image. Among other things it sets the JVM heap size based on container limits.

[rabbah]

Issue moved to apache/incubator-openwhisk-runtime-java #5 via ZenHub