The following tests fail in the JDK20 CI:

vmTestbase/nsk/jdi/ExceptionRequest/addInstanceFilter/instancefilter001/TestDescription.java
vmTestbase/nsk/jdi/ExceptionRequest/addInstanceFilter/instancefilter004/TestDescription.java

Here's a snippet from the instancefilter001 log file:

#section:main
----------messages:(6/1066)----------
command: main nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001 -verbose -arch=linux-x64 -waittime=5 -debugee.vmkind=java -transport.address=dynamic -debugee.vmkeys="-XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/19/36/bundles/linux-x64/jdk-19_linux-x64_bin.tar.gz/jdk-19 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/91e16c40-06d4-468a-9fc3-7198a5bb7d5a-S17299/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5bdab714-fb1e-4abf-adee-73e6b99ed892/runs/54b049eb-ac3a-4a0d-b682-d731820ab9ca/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_nsk_jdi/tmp -XX:+UseZGC"
reason: User specified action: run main/othervm nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001 -verbose -arch=${os.family}-${os.simpleArch} -waittime=5 -debugee.vmkind=java -transport.address=dynamic -debugee.vmkeys="${test.vm.opts} ${test.java.opts}"
started: Sat Dec 03 06:23:31 UTC 2022
Mode: othervm [/othervm specified]
finished: Sat Dec 03 06:23:48 UTC 2022
elapsed time (seconds): 16.379
----------configuration:(0/0)----------
----------System.out:(161/12703)*----------
binder> VirtualMachineManager: version 20.0
binder> Finding connector: default
binder> LaunchingConnector:
binder> name: com.sun.jdi.CommandLineLaunch
binder> description: Launches target using Sun Java VM command line and attaches to it
binder> transport: com.sun.tools.jdi.SunCommandLineLauncher$2@11df7b34
binder> Connector arguments:
binder> main=nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001a \u0000-verbose\u0000 \u0000-arch=linux-x64\u0000 \u0000-waittime=5\u0000 \u0000-debugee.vmkind=java\u0000 \u0000-transport.address=dynamic\u0000 \u0000-debugee.vmkeys="-XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/19/36/bundles/linux-x64/jdk-19_linux-x64_bin.tar.gz/jdk-19 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/91e16c40-06d4-468a-9fc3-7198a5bb7d5a-S17299/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5bdab714-fb1e-4abf-adee-73e6b99ed892/runs/54b049eb-ac3a-4a0d-b682-d731820ab9ca/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_nsk_jdi/tmp -XX:+UseZGC"\u0000 \u0000-pipe.port=34371\u0000
binder> includevirtualthreads=y
binder> quote=\u0000
binder> home=/opt/mach5/mesos/work_dir/jib-master/install/jdk-20+27-2055/linux-x64-debug.jdk/jdk-20/fastdebug
binder> vmexec=java
binder> suspend=true
binder> options=-XX:MaxRAMPercentage=4.16667 -Dtest.boot.jdk=/opt/mach5/mesos/work_dir/jib-master/install/jdk/19/36/bundles/linux-x64/jdk-19_linux-x64_bin.tar.gz/jdk-19 -Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/91e16c40-06d4-468a-9fc3-7198a5bb7d5a-S17299/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5bdab714-fb1e-4abf-adee-73e6b99ed892/runs/54b049eb-ac3a-4a0d-b682-d731820ab9ca/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_nsk_jdi/tmp -XX:+UseZGC
binder> Launching debugee
binder> Waiting for VM initialized
Initial VMStartEvent received: VMStartEvent in thread main
EventHandler> Adding listener nsk.share.jdi.EventHandler$1@620b4c99
EventHandler> Adding listener nsk.share.jdi.EventHandler$2@3c30ea1d
EventHandler> Adding listener nsk.share.jdi.EventHandler$3@625d200a
EventHandler> Adding listener nsk.share.jdi.EventHandler$4@5d4cf655
EventHandler> Adding listener nsk.share.jdi.EventHandler$5@5a9ea209
EventHandler> waitForRequestedEvent: enabling remove of listener nsk.share.jdi.EventHandler$6@8543d1
EventHandler> Adding listener nsk.share.jdi.EventHandler$6@8543d1
EventHandler> waitForRequestedEvent: vm.resume called
EventHandler> Received event set with policy = SUSPEND_EVENT_THREAD
EventHandler> Event: ClassPrepareEventImpl req class prepare request (enabled)
EventHandler> waitForRequestedEvent: Received event(ClassPrepareEvent in thread main) for request(class prepare request (enabled))
EventHandler> Removing listener nsk.share.jdi.EventHandler$6@8543d1
debugger> Received ClassPrepareEvent for debuggee class: nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001a
binder> Breakpoint set:
breakpoint request nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001a:75 (disabled)
EventHandler> Adding listener nsk.share.jdi.TestDebuggerType1$1@6ba6795a
debugger> TESTING BEGINS
debugger> RESUME DEBUGGEE VM
debugger> shouldRunAfterBreakpoint: entered
debugger> shouldRunAfterBreakpoint: waiting for breakpoint event during 1 sec.
debugee.stderr> **> debuggee: debuggee started!
debugee.stderr> **> debuggee: methodForCommunication();
EventHandler> Received event set with policy = SUSPEND_ALL
EventHandler> Event: BreakpointEventImpl req breakpoint request nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001a:75 (enabled)
debugger> Received communication breakpoint event.
debugger> shouldRunAfterBreakpoint: received breakpoint event.
debugger> shouldRunAfterBreakpoint: exited with true.
debugger> :::::: case: # 0
debugger> ......setting up ExceptionRequest:
debugger> thread: instance of java.lang.Thread(name='thread1', id=291); class: class nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001aTestClass (loaded by instance of jdk.internal.loader.ClassLoaders$AppClassLoader(id=293)); property: ExceptionRequest1
debugger> ExceptionRequest has been set up
debugger> ......setting up ExceptionRequest:
debugger> thread: instance of java.lang.Thread(name='thread2', id=297); class: class nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001aTestClass (loaded by instance of jdk.internal.loader.ClassLoaders$AppClassLoader(id=293)); property: ExceptionRequest2
debugger> ExceptionRequest has been set up
debugger> ......waiting for ExceptionEvent in expected thread
EventHandler> waitForRequestedEvent: enabling remove of listener nsk.share.jdi.EventHandler$6@5884b135
EventHandler> Adding listener nsk.share.jdi.EventHandler$6@5884b135
EventHandler> waitForRequestedEvent: vm.resume called
debugee.stderr> **> debuggee: 'run': enter :: threadName == thread1
debugee.stderr> **> debuggee: 'run': enter :: threadName == thread2
debugee.stderr> **> debuggee: objTC[tNumber].method(); :: threadName == thread1 tNumber == 0
debugee.stderr> **> debuggee: objTC[tNumber].method(); :: threadName == thread2 tNumber == 1
debugee.stderr> **> debuggee: instancefilter001aTestClass.method() : thread1
debugee.stderr> **> debuggee: instancefilter001aTestClass.method() : thread2
debugee.stdout> # To suppress the following error report, specify this argument
debugee.stdout> # after -XX: or in .hotspotrc: SuppressErrorAt=/stackWatermark.cpp:254
debugee.stdout> #
debugee.stdout> # A fatal error has been detected by the Java Runtime Environment:
debugee.stdout> #
debugee.stdout> # Internal Error (/opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S137526/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/41cd15c8-7bc9-4b55-84c5-41044574a751/runs/f2fad46b-6b5f-48a7-8b77-e63b6eb32fa8/workspace/open/src/hotspot/share/runtime/stackWatermark.cpp:254), pid=2186378, tid=2186633
debugee.stdout> # assert(watermark == __null || _linked_watermark == __null) failed: nesting not supported
debugee.stdout> #
debugee.stdout> # JRE version: Java(TM) SE Runtime Environment (20.0+27) (fastdebug build 20-ea+27-2055)
debugee.stdout> # Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 20-ea+27-2055, mixed mode, sharing, tiered, compressed class ptrs, z gc, linux-amd64)
debugee.stdout> # Problematic frame:
debugee.stdout> # V [libjvm.so+0x19155e0] StackWatermark::link_watermark(StackWatermark*)+0x40
debugee.stdout> #
debugee.stdout> # Core dump will be written. Default location: Core dumps may be processed with "/opt/core.sh %p" (or dumping to /opt/mach5/mesos/work_dir/slaves/91e16c40-06d4-468a-9fc3-7198a5bb7d5a-S17299/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5bdab714-fb1e-4abf-adee-73e6b99ed892/runs/54b049eb-ac3a-4a0d-b682-d731820ab9ca/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_nsk_jdi/scratch/5/core.2186378)
debugee.stdout> #
debugee.stdout> # An error report file with more information is saved as:
debugee.stdout> # /opt/mach5/mesos/work_dir/slaves/91e16c40-06d4-468a-9fc3-7198a5bb7d5a-S17299/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/5bdab714-fb1e-4abf-adee-73e6b99ed892/runs/54b049eb-ac3a-4a0d-b682-d731820ab9ca/testoutput/test-support/jtreg_open_test_hotspot_jtreg_vmTestbase_nsk_jdi/scratch/5/hs_err_pid2186378.log
debugee.stdout> #
debugee.stdout> # If you would like to submit a bug report, please visit:
debugee.stdout> # https://bugreport.java.com/bugreport/crash.jsp
debugee.stdout> #
EventHandler> Received event set with policy = SUSPEND_NONE
EventHandler> Event: VMDisconnectEventImpl req null
EventHandler> receieved VMDisconnect
EventHandler> Removing listener nsk.share.jdi.EventHandler$4@5d4cf655
EventHandler> finished
# ERROR: debugger> Unexpected exception : waitForRequestedEvent: no requested events have been received.
The following stacktrace is for failure analysis.
nsk.share.TestFailure: debugger> Unexpected exception : waitForRequestedEvent: no requested events have been received.
at nsk.share.Log.logExceptionForFailureAnalysis(Log.java:432)
at nsk.share.Log.complain(Log.java:403)
at nsk.share.jdi.TestDebuggerType1.complain(TestDebuggerType1.java:78)
at nsk.share.jdi.TestDebuggerType1.setFailedStatus(TestDebuggerType1.java:85)
at nsk.share.jdi.TestDebuggerType1.runThis(TestDebuggerType1.java:147)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.run(instancefilter001.java:78)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.main(instancefilter001.java:73)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1599)
nsk.share.Failure: waitForRequestedEvent: no requested events have been received.
at nsk.share.jdi.EventHandler.waitForRequestedEvent(EventHandler.java:431)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.testRun(instancefilter001.java:145)
at nsk.share.jdi.TestDebuggerType1.runThis(TestDebuggerType1.java:119)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.run(instancefilter001.java:78)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.main(instancefilter001.java:73)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1599)
debugger> Forcing debuggee to exit...
# ERROR: binder> Debugee VM has not exited correctly: trying to kill it
The following stacktrace is for failure analysis.
nsk.share.TestFailure: binder> Debugee VM has not exited correctly: trying to kill it
at nsk.share.Log.logExceptionForFailureAnalysis(Log.java:432)
at nsk.share.Log.complain(Log.java:403)
at nsk.share.jpda.DebugeeProcess.complain(DebugeeProcess.java:455)
at nsk.share.jpda.DebugeeProcess.close(DebugeeProcess.java:435)
at nsk.share.jpda.DebugeeProcess.finalize(DebugeeProcess.java:464)
at nsk.share.FinalizableObject.finalizeAtExit(FinalizableObject.java:48)
at nsk.share.Finalizer$FinalizerThread.run(Finalizer.java:122)
------------ Try to print debuggee threads before killing process ------------
The following stacktrace is for failure analysis.
nsk.share.TestFailure:
at nsk.share.Log.logExceptionForFailureAnalysis(Log.java:432)
at nsk.share.Log.complain(Log.java:403)
at nsk.share.jdi.Debugee.printThreadsInfo(Debugee.java:629)
at nsk.share.jdi.Debugee.killDebugee(Debugee.java:640)
at nsk.share.jdi.LocalLaunchedDebugee.killDebugee(Binder.java:1052)
at nsk.share.jpda.DebugeeProcess.close(DebugeeProcess.java:436)
at nsk.share.jpda.DebugeeProcess.finalize(DebugeeProcess.java:464)
at nsk.share.FinalizableObject.finalizeAtExit(FinalizableObject.java:48)
at nsk.share.Finalizer$FinalizerThread.run(Finalizer.java:122)
com.sun.jdi.VMDisconnectedException: connection is closed
at jdk.jdi/com.sun.tools.jdi.TargetVM.send(TargetVM.java:293)
at jdk.jdi/com.sun.tools.jdi.VirtualMachineImpl.sendToTarget(VirtualMachineImpl.java:1172)
at jdk.jdi/com.sun.tools.jdi.PacketStream.send(PacketStream.java:79)
at jdk.jdi/com.sun.tools.jdi.JDWP$VirtualMachine$AllThreads.enqueueCommand(JDWP.java:319)
at jdk.jdi/com.sun.tools.jdi.JDWP$VirtualMachine$AllThreads.process(JDWP.java:310)
at jdk.jdi/com.sun.tools.jdi.VMState.allThreads(VMState.java:207)
at jdk.jdi/com.sun.tools.jdi.VirtualMachineImpl.allThreads(VirtualMachineImpl.java:458)
at nsk.share.jdi.Debugee.printThreadsInfo(Debugee.java:598)
at nsk.share.jdi.Debugee.killDebugee(Debugee.java:640)
at nsk.share.jdi.LocalLaunchedDebugee.killDebugee(Binder.java:1052)
at nsk.share.jpda.DebugeeProcess.close(DebugeeProcess.java:436)
at nsk.share.jpda.DebugeeProcess.finalize(DebugeeProcess.java:464)
at nsk.share.FinalizableObject.finalizeAtExit(FinalizableObject.java:48)
at nsk.share.Finalizer$FinalizerThread.run(Finalizer.java:122)
binder> Killing debuggee by forcing target VM to exit
binder> Ignore VMDisconnectedException while forcing debuggee VM to exit:
com.sun.jdi.VMDisconnectedException: connection is closed
Killing debugee VM process


#>
#> SUMMARY: Following errors occured
#> during test execution:
#>
# ERROR: debugger> Unexpected exception : waitForRequestedEvent: no requested events have been received.
# ERROR: binder> Debugee VM has not exited correctly: trying to kill it
----------System.err:(19/1333)----------
com.sun.jdi.VMDisconnectedException: connection is closed
at jdk.jdi/com.sun.tools.jdi.TargetVM.send(TargetVM.java:293)
at jdk.jdi/com.sun.tools.jdi.VirtualMachineImpl.sendToTarget(VirtualMachineImpl.java:1172)
at jdk.jdi/com.sun.tools.jdi.PacketStream.send(PacketStream.java:79)
at jdk.jdi/com.sun.tools.jdi.JDWP$VirtualMachine$Exit.enqueueCommand(JDWP.java:655)
at jdk.jdi/com.sun.tools.jdi.JDWP$VirtualMachine$Exit.process(JDWP.java:641)
at jdk.jdi/com.sun.tools.jdi.VirtualMachineImpl.exit(VirtualMachineImpl.java:644)
at nsk.share.jdi.TestDebuggerType1.runThis(TestDebuggerType1.java:150)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.run(instancefilter001.java:78)
at nsk.jdi.ExceptionRequest.addInstanceFilter.instancefilter001.main(instancefilter001.java:73)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
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:1599)

JavaTest Message: Test threw exception: com.sun.jdi.VMDisconnectedException: connection is closed
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: com.sun.jdi.VMDisconnectedException: connection is closed
----------rerun:(35/8632)*----------


The failure mode for instancefilter004 appears to be very similar.