ArchivedModuleCompareTest.java tests equality of the entire STDOUT of two spawned JVM processes [1]. However, if this test is run with

jtreg -vmoptions:-Xlog:cds ArchivedModuleCompareTest.java

The two processes will have different logging out, and thus will fail the equality test:

----------System.err:(14/890)----------
java.lang.RuntimeException: java.base is different from HeapRegion::GrainBytes = 1048576
[0.020s][info][cds] narrow_klass_base = 0x0000000800000000
at TestCommon.checkOutputStrings(TestCommon.java:606)
at ArchivedModuleCompareTest.main(ArchivedModuleCompareTest.java:58)
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$AgentVMRunnable.run(MainActionHelper.java:246)
at java.base/java.lang.Thread.run(Thread.java:833)

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[1] http://hg.openjdk.java.net/jdk/jdk/file/438337c846fb/test/hotspot/jtreg/runtime/cds/appcds/cacheObject/ArchivedModuleCompareTest.java#l58