jps test TestJpsSanity.java can intermittently timeout

The following jps test timed out on a recent Solaris X64 'release' bits run:

sun/tools/jps/TestJpsSanity.java

Here's a snippet of where the test appears to be timing out:

"MainThread" #24 prio=5 os_prio=64 tid=0x0000000000b27800 nid=0x50 in Object.wait() [0xffff80ff71dfd000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(java.base@10-internal/Native Method)
        - waiting on <0x00000004001f4208> (a java.lang.ProcessImpl)
        at java.lang.Object.wait(java.base@10-internal/Object.java:328)
        at java.lang.ProcessImpl.waitFor(java.base@10-internal/ProcessImpl.java:494)
        - waiting to re-lock in wait() <0x00000004001f4208> (a java.lang.ProcessImpl)
        at jdk.testlibrary.ProcessTools.executeProcess(ProcessTools.java:381)
        at jdk.testlibrary.ProcessTools.executeProcess(ProcessTools.java:355)
        at JpsHelper.jps(JpsHelper.java:172)
        at JpsHelper.jps(JpsHelper.java:150)
        at TestJpsSanity.testJpsUnknownHost(TestJpsSanity.java:100)
        at TestJpsSanity.main(TestJpsSanity.java:44)
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(java.base@10-internal/Native Method)
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(java.base@10-internal/NativeMethodAccessorImpl.java:62)
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(java.base@10-internal/DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(java.base@10-internal/Method.java:564)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:115)
        at java.lang.Thread.run(java.base@10-internal/Thread.java:844)

so the stack trace shows the MainThread is trying to
run the "jps" cmd.

Here's the test's output of the "jps" cmds it was trying to run:

----------System.out:(24/941)----------
[/work/shared/bug_hunt/8167108/SMR_base_10/build/solaris-x86_64-normal-server-release/images/jdk/bin/jps -J-XX:+UsePerfData -?]
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>: <hostname>[:<port>]

[/work/shared/bug_hunt/8167108/SMR_base_10/build/solaris-x86_64-normal-server-release/images/jdk/bin/jps -J-XX:+UsePerfData -help]
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>: <hostname>[:<port>]

[/work/shared/bug_hunt/8167108/SMR_base_10/build/solaris-x86_64-normal-server-release/images/jdk/bin/jps -J-XX:+UsePerfData -version]
illegal argument: -version
usage: jps [-help]
       jps [-q] [-mlvV] [<hostid>]

Definitions:
    <hostid>: <hostname>[:<port>]

[/work/shared/bug_hunt/8167108/SMR_base_10/build/solaris-x86_64-normal-server-release/images/jdk/bin/jps -J-XX:+UsePerfData Oja781nh2ev7vcvbajdg-Sda1-C.invalid]
Timeout signalled after 360 seconds


So that last "jps" cmd is the one that timed out.