gc/stress/gclocker/TestGCLockerWithParallel.java: fails with OOME Java heap space
Failures seen on Linux hosts only so far.

[26.760s][info][gc,start ] GC(145) Pause Full (Ergonomics)
[26.760s][info][gc,phases,start] GC(145) Marking Phase
[26.844s][info][gc,phases ] GC(145) Marking Phase 83.443ms
[26.844s][info][gc,phases,start] GC(145) Summary Phase
[26.844s][info][gc,phases ] GC(145) Summary Phase 0.041ms
[26.844s][info][gc,phases,start] GC(145) Adjust Roots
[26.844s][info][gc,phases ] GC(145) Adjust Roots 0.545ms
[26.844s][info][gc,phases,start] GC(145) Compaction Phase
[26.893s][info][gc,phases ] GC(145) Compaction Phase 48.097ms
[26.893s][info][gc,phases,start] GC(145) Post Compact
[26.902s][info][gc,phases ] GC(145) Post Compact 9.361ms
[26.902s][info][gc,heap ] GC(145) PSYoungGen: 170105K->170105K(341504K)
[26.902s][info][gc,heap ] GC(145) ParOldGen: 1023941K->1023932K(1024000K)
[26.902s][info][gc,metaspace ] GC(145) Metaspace: 6972K->6972K(1056768K)
[26.902s][info][gc ] GC(145) Pause Full (Ergonomics) 1166M->1166M(1333M) 141.718ms
[26.902s][info][gc,cpu ] GC(145) User=2.30s Sys=0.00s Real=0.14s
[26.913s][info][gc,heap,exit ] Heap
[26.913s][info][gc,heap,exit ] PSYoungGen total 341504K, used 171008K [0x00000000e0c00000, 0x0000000100000000, 0x0000000100000000)
[26.913s][info][gc,heap,exit ] eden space 171008K, 100% used [0x00000000e0c00000,0x00000000eb300000,0x00000000eb300000)
[26.913s][info][gc,heap,exit ] lgrp 0 space 75760K, 100% used [0x00000000e0c00000,0x00000000e55fc000,0x00000000e55fc000)
[26.913s][info][gc,heap,exit ] lgrp 1 space 95248K, 100% used [0x00000000e55fc000,0x00000000eb300000,0x00000000eb300000)
[26.913s][info][gc,heap,exit ] from space 170496K, 0% used [0x00000000f5980000,0x00000000f5980000,0x0000000100000000)
[26.913s][info][gc,heap,exit ] to space 170496K, 0% used [0x00000000eb300000,0x00000000eb300000,0x00000000f5980000)
[26.913s][info][gc,heap,exit ] ParOldGen total 1024000K, used 1023932K [0x00000000a2400000, 0x00000000e0c00000, 0x00000000e0c00000)
[26.913s][info][gc,heap,exit ] object space 1024000K, 99% used [0x00000000a2400000,0x00000000e0bef118,0x00000000e0c00000)
[26.913s][info][gc,heap,exit ] Metaspace used 7199K, capacity 7476K, committed 7680K, reserved 1056768K
[26.913s][info][gc,heap,exit ] class space used 658K, capacity 734K, committed 768K, reserved 1048576K
----------System.err:(6/303)----------
java.lang.OutOfMemoryError: Java heap space
at Filler.<init>(TestGCLocker.java:50)
at MemoryUser.load(TestGCLocker.java:150)
at MemoryUser.run(TestGCLocker.java:164)
at java.base/java.lang.Thread.run(Thread.java:844)
STATUS:Failed.`main' threw exception: java.lang.OutOfMemoryError: Java heap space