Centos 7.7 in Virtual Box on WIndows 7 all 64-bit

Hi all!
I installed CentOS 7.7 in the latest version of VirtualBox.  This has Windows 7 64 bit as the host OS.
I went through the install procedure for RH 7.x.
Everything seemed to go ok with the installer.... then I got to here.....
Installer completed successfully!
==============================================================================OpenNMS Upgrader==============================================================================
java.lang.reflect.InvocationTargetException        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)        at java.lang.reflect.Method.invoke(Method.java:498)        at org.opennms.bootstrap.Bootstrap$4.run(Bootstrap.java:525)        at java.lang.Thread.run(Thread.java:748)Caused by: java.lang.NoClassDefFoundError: com/sun/tools/attach/AttachNotSupportedException        at org.opennms.netmgt.vmmgr.ControllerUtils.getController(ControllerUtils.java:48)        at org.opennms.upgrade.support.Upgrade.isOpennmsRunning(Upgrade.java:110)        at org.opennms.upgrade.support.Upgrade.execute(Upgrade.java:233)        at org.opennms.upgrade.support.Upgrade.main(Upgrade.java:266)        ... 6 moreCaused by: java.lang.ClassNotFoundException: com.sun.tools.attach.AttachNotSupportedException        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)        at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:814)        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)        ... 10 more[root@VB opennms]# 
Packages of interest (am I missing anything?):
[root@VB opennms]# rpm -qa | egrep -i 'opennms|postgrel|jdk|rrd|jicmp'jicmp-2.0.3-1.el7.centos.x86_64rrdtool-1.6.0-0.3.opennms.el7.centos.x86_64java-1.8.0-openjdk-1.8.0.144-0.b01.el7_4.x86_64opennms-core-20.1.0-1.noarchjrrd-1.1.0-3.el7.centos.x86_64java-1.8.0-openjdk-headless-1.8.0.144-0.b01.el7_4.x86_64opennms-20.1.0-1.noarchcopy-jdk-configs-2.2-3.el7.noarchopennms-repo-stable-1.0-109.noarchopennms-webapp-jetty-20.1.0-1.noarchrrdtool-perl-1.6.0-0.3.opennms.el7.centos.x86_64jicmp6-2.0.2-1.el7.centos.x86_64jrrd2-2.0.3-4.el7.centos.x86_64

I can enable and TRY to start opennms but it barfs.... (btw, where are the usual log files being kept for OpenNMS?  

[root@VB opennms]# systemctl enable opennms[root@VB opennms]# systemctl start opennmsJob for opennms.service failed because the control process exited with error code. See "systemctl status opennms.service" and "journalctl -xe" for details.
so.... journalctl -xe:
-- -- Unit opennms.service has begun starting up.Sep 26 11:21:42 VB opennms[4293]: Starting OpenNMS: Exception in thread "main" jSep 26 11:21:42 VB opennms[4293]: at java.lang.Class.getDeclaredMethods0(Native Sep 26 11:21:42 VB opennms[4293]: at java.lang.Class.privateGetDeclaredMethods(CSep 26 11:21:42 VB opennms[4293]: at java.lang.Class.privateGetMethodRecursive(CSep 26 11:21:42 VB opennms[4293]: at java.lang.Class.getMethod0(Class.java:3018)Sep 26 11:21:42 VB opennms[4293]: at java.lang.Class.getMethod(Class.java:1784)Sep 26 11:21:42 VB opennms[4293]: at org.opennms.bootstrap.Bootstrap.executeClasSep 26 11:21:42 VB opennms[4293]: at org.opennms.bootstrap.Bootstrap.executeClasSep 26 11:21:42 VB opennms[4293]: at org.opennms.bootstrap.Bootstrap.main(BootstSep 26 11:21:42 VB opennms[4293]: Caused by: java.lang.ClassNotFoundException: cSep 26 11:21:42 VB opennms[4293]: at java.net.URLClassLoader.findClass(URLClassLSep 26 11:21:42 VB opennms[4293]: at java.lang.ClassLoader.loadClass(ClassLoaderSep 26 11:21:42 VB opennms[4293]: at java.net.FactoryURLClassLoader.loadClass(URSep 26 11:21:42 VB opennms[4293]: at java.lang.ClassLoader.loadClass(ClassLoaderSep 26 11:21:42 VB opennms[4293]: ... 8 moreSep 26 11:21:42 VB opennms[4293]: Unknown value return from doStatus: 1Sep 26 11:21:42 VB opennms[4293]: [FAILED]Sep 26 11:21:42 VB systemd[1]: opennms.service: control process exited, code=exiSep 26 11:21:42 VB systemd[1]: Failed to start OpenNMS server.-- Subject: Unit opennms.service has failed-- Defined-By: systemd-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel-- -- Unit opennms.service has failed.-- -- The result is failed.Sep 26 11:21:42 VB systemd[1]: Unit opennms.service entered failed state.Sep 26 11:21:42 VB systemd[1]: opennms.service failed.Sep 26 11:21:42 VB polkitd[657]: Unregistered Authentication Agent for unix-proc

(I hope sourceforge is back up soon.... )
Thanks All!
P.

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