The following test failed in the JDK16 CI:

serviceability/sa/TestSysProps.java
serviceability/sa/ClhsdbJstackXcompStress.java
serviceability/sa/ClhsdbInspect.java

Here's a snippet from the TestSysProps.java log file:

----------System.err:(43/2606)----------


 stdout: [hsdb> hsdb> + verbose true
hsdb> + sysprops
];
 stderr: [Attaching to process 64961, please wait...
Exception in thread "main" java.lang.InternalError: Metadata does not appear to be polymorphic
	at jdk.hotspot.agent/sun.jvm.hotspot.types.basic.BasicTypeDataBase.findDynamicTypeForAddress(BasicTypeDataBase.java:279)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VirtualBaseConstructor.instantiateWrapperFor(VirtualBaseConstructor.java:104)
	at jdk.hotspot.agent/sun.jvm.hotspot.oops.Metadata.instantiateWrapperFor(Metadata.java:76)
	at jdk.hotspot.agent/sun.jvm.hotspot.memory.SystemDictionary.getSystemKlass(SystemDictionary.java:99)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.readSystemProperties(VM.java:1053)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.getSystemProperties(VM.java:1047)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.SysPropsDumper.run(SysPropsDumper.java:44)
	at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor$51.doit(CommandProcessor.java:1773)
	at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2051)
	at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2021)
	at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.run(CommandProcessor.java:1901)
	at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.run(CLHSDB.java:99)
	at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.main(CLHSDB.java:40)
	at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runCLHSDB(SALauncher.java:280)
	at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:483)
]
 exitValue = 1

java.lang.RuntimeException: Expected to get exit value of [0]

	at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:457)
	at ClhsdbLauncher.runCmd(ClhsdbLauncher.java:142)
	at ClhsdbLauncher.run(ClhsdbLauncher.java:200)
	at TestSysProps.main(TestSysProps.java:127)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	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.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Expected to get exit value of [0]

JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Expected to get exit value of [0]
----------rerun:(43/7669)*----------


Here's a snippet from the ClhsdbJstackXcompStress.java log file:

----------System.err:(59/3875)----------
 stdout: [Attaching to process ID 64546, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 16-ea+12-426
Deadlock Detection:

No deadlocks found.

"main" #1 prio=5 tid=0x00007fee48809220 nid=0x2803 waiting on condition [0x0000700007994000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
   JavaThread state: _thread_blocked
];
 stderr: [java.lang.InternalError: CodeHeap does not appear to be polymorphic
	at jdk.hotspot.agent/sun.jvm.hotspot.types.basic.BasicTypeDataBase.findDynamicTypeForAddress(BasicTypeDataBase.java:279)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VirtualBaseConstructor.instantiateWrapperFor(VirtualBaseConstructor.java:104)
	at jdk.hotspot.agent/sun.jvm.hotspot.utilities.GrowableArray.at(GrowableArray.java:63)
	at jdk.hotspot.agent/sun.jvm.hotspot.code.CodeCache.contains(CodeCache.java:77)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VM.isJavaPCDbg(VM.java:903)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.amd64.AMD64CurrentFrameGuess.run(AMD64CurrentFrameGuess.java:194)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.bsd_amd64.BsdAMD64JavaThreadPDAccess.getCurrentFrameGuess(BsdAMD64JavaThreadPDAccess.java:101)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.JavaThread.getCurrentFrameGuess(JavaThread.java:268)
	at jdk.hotspot.agent/sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:230)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:81)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:45)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.JStack.run(JStack.java:67)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:262)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.start(Tool.java:225)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
	at jdk.hotspot.agent/sun.jvm.hotspot.tools.JStack.runWithArgs(JStack.java:90)
	at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runJSTACK(SALauncher.java:300)
	at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:483)
]
 exitValue = 1

java.lang.RuntimeException: stderr was not empty
	at jdk.test.lib.process.OutputAnalyzer.stderrShouldBeEmptyIgnoreVMWarnings(OutputAnalyzer.java:145)
	at ClhsdbJstackXcompStress.runJstackInLoop(ClhsdbJstackXcompStress.java:77)
	at ClhsdbJstackXcompStress.main(ClhsdbJstackXcompStress.java:100)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	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.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:832)
java.lang.RuntimeException: stderr was not empty
	at jdk.test.lib.process.OutputAnalyzer.stderrShouldBeEmptyIgnoreVMWarnings(OutputAnalyzer.java:145)
	at ClhsdbJstackXcompStress.runJstackInLoop(ClhsdbJstackXcompStress.java:77)
	at ClhsdbJstackXcompStress.main(ClhsdbJstackXcompStress.java:100)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException: stderr was not empty
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: stderr was not empty
----------rerun:(43/7746)*----------