This happened on Windows Platform. I can reproduce it stably with jdk9-dev nightly build.


Please refer to following test output:
----------System.out:(89/6084)*----------
whoami: aurora, user.name: aurora
[TestNG] Running:
  java/lang/ProcessHandle/InfoTest.java

Note: when run in samevm mode the cputime of the test runner is included.
 info: [user: Optional[aurora], cmd: C:\\Users\\aurora\\CommonData\\jdk\\bin\\java.exe, startTime: Optional[2015-05-30T03:46:00.601Z], totalTime: Optional[PT1.25S]]
test InfoTest.test1(): success
 info: [user: Optional[aurora], cmd: C:\\Users\\aurora\\CommonData\\jdk\\bin\\java.exe, startTime: Optional[2015-05-30T03:46:02.059Z], totalTime: Optional[PT0.765625S]]
test InfoTest.test2(): failure
java.lang.AssertionError: Command: expected: 'java', actual: Optional[C:\\Users\\aurora\\CommonData\\jdk\\bin\\java.exe] expected [C:\\users\\aurora\\CommonData\\jdk\\bin\\java.exe] but found [C:\\Users\\aurora\\CommonData\\jdk\\bin\\java.exe]
at org.testng.Assert.fail(Assert.java:94)
at org.testng.Assert.failNotEquals(Assert.java:494)
at org.testng.Assert.assertEquals(Assert.java:123)
at org.testng.Assert.assertEquals(Assert.java:176)
at InfoTest.test2(InfoTest.java:151)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:502)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
at org.testng.TestRunner.privateRun(TestRunner.java:767)
at org.testng.TestRunner.run(TestRunner.java:617)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
at org.testng.SuiteRunner.run(SuiteRunner.java:240)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1149)
at org.testng.TestNG.run(TestNG.java:1057)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:163)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:502)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:745)
 info: [user: Optional[aurora], cmd: C:\\Windows\\System32\\sleep.exe, startTime: Optional[2015-05-30T03:46:02.665Z], totalTime: Optional[PT0S]]
 info: [user: Optional[aurora], cmd: C:\\Windows\\System32\\sleep.exe, startTime: Optional[2015-05-30T03:46:03.680Z], totalTime: Optional[PT0S]]
destroyProcessTree destroyForcibly
pid 10476, alive: true; parent: Optional[3356], [user: Optional[aurora], cmd: C:\\Users\\aurora\\CommonData\\jdk\\bin\\java.exe, startTime: Optional[2015-05-30T03:46:02.059Z], totalTime: Optional[PT0.765625S]]
test InfoTest.test3(): success
 total1 vs. mbean: PT1.34375S, getProcessCpuTime: PT1.34375S, diff: PT0S
 total2 vs. mbean: PT1.34375S, getProcessCpuTime: PT1.34375S, diff: PT0S
test InfoTest.test4(): success
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1343750000, beanCpu: 1343750000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
 infoTotal: 1359375000, beanCpu: 1359375000, diff: 0
test InfoTest.test5(): success

===============================================
java/lang/ProcessHandle/InfoTest.java
Total tests run: 5, Failures: 1, Skips: 0
===============================================

----------System.err:(14/810)----------
java.lang.Exception: failures: 1
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:166)
at com.sun.javatest.regtest.TestNGAction$TestNGRunner.main(TestNGAction.java:147)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:502)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:92)
at java.lang.Thread.run(Thread.java:745)