Seeking help with Java compile heap memory out-of-memory error on armel for zeroc-ice build

Greetings.

I'm looking for some help for a build failure on armel related to 
compiling Java that has cropped up in the last couple of weeks. This is 
keeping Debian packages zeroc-ice as well as mumble from transitioning 
to Testing.

The compile seems to fail during a Gradle / Java memory check and seems 
to be specific to armel.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1069538

I've done additional test builds on 2 armel Debian porter boxes and the 
error is repeatable.

> :test:compileJava
> Putting task artifact state for task ':test:compileJava' into context 
> took 0.0 secs.
> Up-to-date check for task ':test:compileJava' took 47.549 secs. It is 
> not up-to-date because:
>   No history is available.
> All input files are considered out-of-date for incremental task 
> ':test:compileJava'.
> Use of target 1.7 is no longer supported, switching to 8
> Use of source 1.7 is no longer supported, switching to 8
> Compiling with JDK Java compiler API.
> Failed to execute 
> org.gradle.process.internal.health.memory.DefaultMemoryManager$MemoryCheck@12c1b75.
> An exception has occurred in the compiler (17.0.11). Please file a bug 
> against the Java compiler via the Java bug reporting page 
> (https://bugreport.java.com) after checking the Bug Database 
> (https://bugs.java.com) for duplicates. Include your program, the 
> following diagnostic, and the parameters passed to the Java compiler 
> in your report. Thank you.
> java.lang.OutOfMemoryError: Java heap space
> :test:compileJava FAILED
> :test:compileJava (Thread[Task worker for ':',5,main]) completed. Took 
> 48 mins 58.651 secs.

I'd like to know how to fix or work around this bug if possible.

Thanks