gc/arguments/TestAggressiveHeap.java fails intermittently

I hit this test failure 2 times in JPRT. I think the test should be run with -Xmx flag but I could be wrong.

# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 19658702848 bytes for committing reserved memory.
# An error report file with more information is saved as:
# hotspot/testoutput/hotspot_tier1_gc_2/JTwork/scratch/3/hs_err_pid24731.log
];
 stderr: [Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000ad400000, 19658702848, 0) failed; error='Resource unavailable, try again' (errno=11)
]
 exitValue = 1

java.lang.RuntimeException: Expected to get exit value of [0]

at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:380)
at TestAggressiveHeap.testFlag(TestAggressiveHeap.java:66)
at TestAggressiveHeap.main(TestAggressiveHeap.java:46)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$SameVMRunnable.run(MainActionHelper.java:230)
at java.base/java.lang.Thread.run(Thread.java:844)