After the integration of:

JDK-8300809 Cleanup UT problem list

the following three tests started to fail with UsageTracker enabled:

serviceability/jvmti/HeapMonitor/MyPackage/HeapMonitorArrayAllSampledTest.java
serviceability/jvmti/HeapMonitor/MyPackage/HeapMonitorMultiArrayTest.java
serviceability/jvmti/HeapMonitor/MyPackage/HeapMonitorRecursiveTest.java

In the first sighting after JDK-8300809,
HeapMonitorArrayAllSampledTest.java failed on two different
platforms with two different modes:

linux-x64-debug showed:

----------System.err:(12/816)----------
Unexpected high difference percentage: 48.5 due to the count being 1485.0 instead of 1000
java.lang.RuntimeException: Statistics should show about 1000 samples.
at MyPackage.HeapMonitorArrayAllSampledTest.main(HeapMonitorArrayAllSampledTest.java:64)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1623)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Statistics should show about 1000 samples.
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Statistics should show about 1000 samples.
----------rerun:(38/7640)*----------

windows-x64 showed:

----------System.err:(12/752)----------
java.lang.RuntimeException: Could not set the sampler
at MyPackage.HeapMonitor.sampleEverything(HeapMonitor.java:194)
at MyPackage.HeapMonitorArrayAllSampledTest.main(HeapMonitorArrayAllSampledTest.java:51)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1623)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Could not set the sampler
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Could not set the sampler
----------rerun:(41/6601)*----------


In the first sighting after JDK-8300809,
HeapMonitorMultiArrayTest.java failed on three different
platforms with two different modes:

windows-x64-debug and macox-x64-debug showed:

----------System.err:(12/742)----------
java.lang.RuntimeException: Could not set the sampler
at MyPackage.HeapMonitor.sampleEverything(HeapMonitor.java:194)
at MyPackage.HeapMonitorMultiArrayTest.main(HeapMonitorMultiArrayTest.java:42)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1623)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Could not set the sampler
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Could not set the sampler
----------rerun:(41/6566)*----------

linux-x64-debug showed:

----------System.err:(11/734)----------
java.lang.RuntimeException: Number of samples (7302) not the expected (6000)
at MyPackage.HeapMonitorMultiArrayTest.main(HeapMonitorMultiArrayTest.java:56)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1623)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Number of samples (7302) not the expected (6000)
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Number of samples (7302) not the expected (6000)
----------rerun:(38/7605)*----------

In the first sighting after JDK-8300809, HeapMonitorRecursiveTest.java
failed on just one platform:

windows-x64-debug showed:

----------System.err:(12/740)----------
java.lang.RuntimeException: Could not set the sampler
at MyPackage.HeapMonitor.sampleEverything(HeapMonitor.java:194)
at MyPackage.HeapMonitorRecursiveTest.main(HeapMonitorRecursiveTest.java:44)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1623)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Could not set the sampler
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Could not set the sampler
----------rerun:(41/6559)*----------