The following test failed due to timeout in the JDK15 CI:

serviceability/dcmd/framework/InvalidCommandTest.java	

Here's a snippet from the log file:

#section:testng
----------messages:(7/487)----------
command: testng -XX:+UsePerfData InvalidCommandTest
reason: User specified action: run testng/othervm -XX:+UsePerfData InvalidCommandTest 
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.base,java.compiler,java.management,jdk.internal.jvmstat --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-exports jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED
Timeout information:
--- Timeout information end.
elapsed time (seconds): 1257.477
----------configuration:(5/225)----------
Boot Layer
  add modules: java.base java.compiler java.management jdk.internal.jvmstat 
  add exports: java.base/jdk.internal.misc              ALL-UNNAMED
               jdk.internal.jvmstat/sun.jvmstat.monitor ALL-UNNAMED

----------System.out:(75/4440)----------
[TestNG] Running:
  serviceability/dcmd/framework/InvalidCommandTest.java

Running DCMD 'asdf' through 'FileJcmdExecutor'
Executing command '[/opt/mach5/mesos/work_dir/jib-master/install/jdk-15+18-721/linux-x64-debug.jdk/jdk-15/fastdebug/bin/jcmd, 32325, -f, /tmp/input13694243197492585235jcmd]'
[2020-04-04T18:51:48.712728Z] Gathering output for process 32447
[2020-04-04T18:51:50.717503Z] Waiting for completion for process 32447
[2020-04-04T18:51:50.737066Z] Waiting for completion finished for process 32447
Command returned with exit code 1
---------------- stdout ----------------
32325:

---------------- stderr ----------------
java.lang.IllegalArgumentException: Unknown diagnostic command

----------------------------------------

test InvalidCommandTest.file(): success
Running DCMD 'asdf' through 'JMXExecutor'
---------------- stdout ----------------

---------------- stderr ----------------
java.lang.IllegalArgumentException: Unknown diagnostic command: asdf
	at jdk.test.lib.dcmd.JMXExecutor.executeImpl(JMXExecutor.java:105)
	at jdk.test.lib.dcmd.CommandExecutor.execute(CommandExecutor.java:61)
	at jdk.test.lib.dcmd.CommandExecutor.execute(CommandExecutor.java:43)
	at InvalidCommandTest.run(InvalidCommandTest.java:46)
	at InvalidCommandTest.jmx(InvalidCommandTest.java:73)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:821)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1131)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
	at org.testng.TestRunner.privateRun(TestRunner.java:773)
	at org.testng.TestRunner.run(TestRunner.java:623)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)
	at org.testng.SuiteRunner.run(SuiteRunner.java:259)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)
	at org.testng.TestNG.run(TestNG.java:1018)
	at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:94)
	at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:54)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	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)
Caused by: javax.management.ReflectionException
	at jdk.management/com.sun.management.internal.DiagnosticCommandImpl.invoke(DiagnosticCommandImpl.java:273)
	at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:809)
	at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
	at jdk.test.lib.dcmd.JMXExecutor.executeImpl(JMXExecutor.java:96)
	... 33 more
Caused by: java.lang.NoSuchMethodException: Method asdf with signature [[Ljava.lang.String;] not found
	... 37 more

----------------------------------------

test InvalidCommandTest.jmx(): success
debugee.stdout> Test Java process started!
debugee.stdout> Waiting for the quit command from the test ...
Running DCMD 'asdf' through 'MainClassJcmdExecutor'
Executing command '[/opt/mach5/mesos/work_dir/jib-master/install/jdk-15+18-721/linux-x64-debug.jdk/jdk-15/fastdebug/bin/jcmd, InvalidCommandTest$Process, asdf]'
[2020-04-04T18:52:04.501715Z] Gathering output for process 32589
Timeout refired 1200 times
----------System.err:(0/0)----------
----------rerun:(47/8186)*----------