The following test failed in my jdk13+19 stress testing run:

sun/tools/jcmd/TestJcmdSanity.java

Here's a snippet of the log file:

Java HotSpot(TM) 64-Bit Server VM version 13-internal+0-2019-05-03-1706391.dcubed.null
JDK 13.0.0
java.io.IOException: Bad file descriptor
        at jdk.attach/sun.tools.attach.VirtualMachineImpl.connect(Native Method)
        at jdk.attach/sun.tools.attach.VirtualMachineImpl.execute(VirtualMachineImpl.java:160)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.executeCommand(HotSpotVirtualMachine.java:309)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.executeJCmd(HotSpotVirtualMachine.java:291)
        at jdk.jcmd/sun.tools.jcmd.JCmd.executeCommandForPid(JCmd.java:125)
        at jdk.jcmd/sun.tools.jcmd.JCmd.main(JCmd.java:99)

----------System.err:(181/9014)----------
<snip>

Java HotSpot(TM) 64-Bit Server VM version 13-internal+0-2019-05-03-1706391.dcubed.null
JDK 13.0.0
];
 stderr: [java.io.IOException: Bad file descriptor
        at jdk.attach/sun.tools.attach.VirtualMachineImpl.connect(Native Method)
        at jdk.attach/sun.tools.attach.VirtualMachineImpl.execute(VirtualMachineImpl.java:160)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.executeCommand(HotSpotVirtualMachine.java:309)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.executeJCmd(HotSpotVirtualMachine.java:291)
        at jdk.jcmd/sun.tools.jcmd.JCmd.executeCommandForPid(JCmd.java:125)
        at jdk.jcmd/sun.tools.jcmd.JCmd.main(JCmd.java:99)
]
 exitValue = 1

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

        at jdk.test.lib.process.OutputAnalyzer.shouldHaveExitValue(OutputAnalyzer.java:430)
        at TestJcmdSanity.testJcmdPidBigScript(TestJcmdSanity.java:120)
        at TestJcmdSanity.main(TestJcmdSanity.java:59)
        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:567)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
        at java.base/java.lang.Thread.run(Thread.java:830)

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:(35/3722)*----------

This failure was only seen in 1 of 3 slowdebug runs. It was not
seen in any of the fastdebug or release runs. I'm marking this
bug as 'intermittent'.