Java build flakes: "Memory constraints are impeding performance"

Java Wordcount Direct Runner (ubuntu-latest) failed a couple times on me with the following warning/error. It doesn't seem like "impeding performance" should cause the build to fail altogether, so I'm wondering if there's some way we can silence this warning.


> Task :sdks:java:extensions:protobuf:compileJava
warning: Memory constraints are impeding performance;
please increase max heap size.

...
> Task :sdks:java:extensions:protobuf:compileJava
error: warnings
found and -Werror specified
Note: Some input files use or override a deprecated API.
Note: Recompile
with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note:
Recompile with -Xlint:unchecked for details.
1 error
1 warning

> Task :sdks:java:extensions:protobuf:compileJava
FAILED
> Task :runners:core-construction-java:compileJava
Note: Some input files use or override a
deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked
or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

FAILURE: Build failed with
an exception.

* What went wrong:
Execution failed for task ':sdks:java:extensions:protobuf:compileJava'.
>
Compilation failed; see the compiler error output for details.

Imported from Jira BEAM-11837. Original Jira may contain additional context.
Reported by: ibzib.