gc/shenandoah/mxbeans/TestPauseNotifications.java randomly failed with -Xcomp

This fails on both aarch64 and x86.

#Test Results (version 2)
#Wed Dec 30 04:56:21 UTC 2020
#-----testdescription-----
$file=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java
$root=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg
id=id0
keywords=othervm
requires=vm.gc.Shenandoah
run=USER_SPECIFIED main/othervm -Xmx128m -XX\:+UnlockDiagnosticVMOptions -XX\:+UnlockExperimentalVMOptions -XX\:+UseShenandoahGC -XX\:ShenandoahGCMode\=passive -XX\:+ShenandoahDegeneratedGC TestPauseNotifications\nUSER_SPECIFIED main/othervm -Xmx128m -XX\:+UnlockDiagnosticVMOptions -XX\:+UnlockExperimentalVMOptions -XX\:+UseShenandoahGC -XX\:ShenandoahGCMode\=passive -XX\:-ShenandoahDegeneratedGC TestPauseNotifications\n
source=TestPauseNotifications.java
title=Check that MX notifications are reported for all cycles

#-----environment-----

#-----testresult-----
description=file\:/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java\#id0
elapsed=17288 0\:00\:17.288
end=Wed Dec 30 04\:56\:21 UTC 2020
environment=regtest
execStatus=Failed. Execution failed\: `main' threw exception\: java.lang.IllegalStateException\: Pauses expected \= [1; 9223372036854775807], actual \= 0
harnessLoaderMode=Classpath Loader
harnessVariety=Full Bundle
hostname=ent-arm-15-ubuntu-openjdk-test
javatestOS=Linux 4.15.0-55-generic (aarch64)
javatestVersion=6.0-ea+b11-2020-12-21
jtregVersion=jtreg 5.1 dev b01
script=com.sun.javatest.regtest.exec.RegressionScript
sections=script_messages build compile main
start=Wed Dec 30 04\:56\:03 UTC 2020
test=gc/shenandoah/mxbeans/TestPauseNotifications.java\#id0
testJDK=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk
totalTime=17290
user.name=ent-user
work=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/gc/shenandoah/mxbeans

#section:script_messages
----------messages:(4/290)----------
JDK under test: /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk
openjdk version "16-internal" 2021-03-16
OpenJDK Runtime Environment (fastdebug build 16-internal+0-git-fb607f165)
OpenJDK 64-Bit Server VM (fastdebug build 16-internal+0-git-fb607f165, compiled mode, sharing)

#section:build
----------messages:(5/157)----------
command: build TestPauseNotifications
reason: Named class compiled on demand
Test directory:
  compile: TestPauseNotifications
elapsed time (seconds): 0.788
result: Passed. Build successful

#section:compile
----------messages:(5/243)----------
command: compile /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java
reason: .class file out of date or does not exist
Mode: agentvm
Agent id: 1
elapsed time (seconds): 0.787
----------configuration:(10/672)----------
Boot Layer (javac runtime environment)
  class path: /home/ent-user/jtreg/jtreg-hg/build/images/jtreg/lib/javatest.jar
              /home/ent-user/jtreg/jtreg-hg/build/images/jtreg/lib/jtreg.jar
  patch: java.base /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/patches/java.base

javac compilation environment
  source path: /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans
  class path: /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans
               /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d

----------rerun:(34/3369)*----------
cd /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/scratch && \\
DISPLAY=:99 \\
HOME=/home/ent-user \\
PATH=/bin:/usr/bin:/usr/sbin \\
    /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/bin/javac \\
        -J-ea \\
        -J-esa \\
        -J-Xmx768m \\
        -J-server \\
        -J-Xcomp \\
        -J-Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal \\
        -J-Djdk.test.docker.image.name=ubuntu \\
        -J-Djdk.test.docker.image.version=20.04 \\
        -J-Djava.net.preferIPv4Stack=true \\
        -J-Djava.library.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/test/hotspot/jtreg/native \\
        -J-Dtest.vm.opts='-ea -esa -Xmx768m -server -Xcomp -Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal -Djdk.test.docker.image.name=ubuntu -Djdk.test.docker.image.version=20.04 -Djava.net.preferIPv4Stack=true' \\
        -J-Dtest.tool.vm.opts='-J-ea -J-esa -J-Xmx768m -J-server -J-Xcomp -J-Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal -J-Djdk.test.docker.image.name=ubuntu -J-Djdk.test.docker.image.version=20.04 -J-Djava.net.preferIPv4Stack=true' \\
        -J-Dtest.compiler.opts= \\
        -J-Dtest.java.opts= \\
        -J-Dtest.jdk=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk \\
        -J-Dcompile.jdk=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk \\
        -J-Dtest.timeout.factor=16.0 \\
        -J-Dtest.nativepath=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/test/hotspot/jtreg/native \\
        -J-Dtest.root=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg \\
        -J-Dtest.name=gc/shenandoah/mxbeans/TestPauseNotifications.java#id0 \\
        -J-Dtest.file=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java \\
        -J-Dtest.src=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -J-Dtest.src.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -J-Dtest.classes=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d \\
        -J-Dtest.class.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d \\
        -J-Dtest.class.path.prefix=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d:/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -d /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d \\
        -sourcepath /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -classpath /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans:/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java
result: Passed. Compilation successful

#section:main
----------messages:(4/479)----------
command: main -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive -XX:+ShenandoahDegeneratedGC TestPauseNotifications
reason: User specified action: run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive -XX:+ShenandoahDegeneratedGC TestPauseNotifications
Mode: othervm [/othervm specified]
elapsed time (seconds): 16.498
----------configuration:(0/0)----------
----------System.out:(0/0)----------
----------System.err:(13/938)----------
java.lang.IllegalStateException: Pauses expected = [1; 9223372036854775807], actual = 0
at TestPauseNotifications.main(TestPauseNotifications.java:164)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:831)

JavaTest Message: Test threw exception: java.lang.IllegalStateException: Pauses expected = [1; 9223372036854775807], actual = 0
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.IllegalStateException: Pauses expected = [1; 9223372036854775807], actual = 0
----------rerun:(39/3462)*----------
cd /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/scratch && \\
DISPLAY=:99 \\
HOME=/home/ent-user \\
PATH=/bin:/usr/bin:/usr/sbin \\
CLASSPATH=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d:/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans:/home/ent-user/jtreg/jtreg-hg/build/images/jtreg/lib/javatest.jar:/home/ent-user/jtreg/jtreg-hg/build/images/jtreg/lib/jtreg.jar \\
    /home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/bin/java \\
        -Dtest.vm.opts='-ea -esa -Xmx768m -server -Xcomp -Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal -Djdk.test.docker.image.name=ubuntu -Djdk.test.docker.image.version=20.04 -Djava.net.preferIPv4Stack=true' \\
        -Dtest.tool.vm.opts='-J-ea -J-esa -J-Xmx768m -J-server -J-Xcomp -J-Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal -J-Djdk.test.docker.image.name=ubuntu -J-Djdk.test.docker.image.version=20.04 -J-Djava.net.preferIPv4Stack=true' \\
        -Dtest.compiler.opts= \\
        -Dtest.java.opts= \\
        -Dtest.jdk=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk \\
        -Dcompile.jdk=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk \\
        -Dtest.timeout.factor=16.0 \\
        -Dtest.nativepath=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/test/hotspot/jtreg/native \\
        -Dtest.root=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg \\
        -Dtest.name=gc/shenandoah/mxbeans/TestPauseNotifications.java#id0 \\
        -Dtest.file=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans/TestPauseNotifications.java \\
        -Dtest.src=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -Dtest.src.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -Dtest.classes=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d \\
        -Dtest.class.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d \\
        -Dtest.class.path.prefix=/home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/classes/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d:/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_src/test/hotspot/jtreg/gc/shenandoah/mxbeans \\
        -ea \\
        -esa \\
        -Xmx768m \\
        -server \\
        -Xcomp \\
        -Dgraalunit.libs=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/jdk/../test/hotspot/jtreg/graal \\
        -Djdk.test.docker.image.name=ubuntu \\
        -Djdk.test.docker.image.version=20.04 \\
        -Djava.net.preferIPv4Stack=true \\
        -Djava.library.path=/home/ent-user/ci-scripts/work-vmoptsXcomp/jdk_build/images/test/hotspot/jtreg/native \\
        -Xmx128m \\
        -XX:+UnlockDiagnosticVMOptions \\
        -XX:+UnlockExperimentalVMOptions \\
        -XX:+UseShenandoahGC \\
        -XX:ShenandoahGCMode=passive \\
        -XX:+ShenandoahDegeneratedGC \\
        com.sun.javatest.regtest.agent.MainWrapper /home/ent-user/ci-scripts/work-vmoptsXcomp/jtwork_rerun/gc/shenandoah/mxbeans/TestPauseNotifications_id0.d/main.0.jta
result: Failed. Execution failed: `main' threw exception: java.lang.IllegalStateException: Pauses expected = [1; 9223372036854775807], actual = 0