there is no supported way to revert the update except re-imaging the box and restoring a backup. I think we should be able to restore GUI access and - if possible - leave the box on the version it currently is. Trying to downgrade may cause more problems than getting the GUI issues fixed.
Can you maybe provide a screenshot of the error message(s)? This helps to get an idea where the issue may come from. Additionally it would be interesting to know if clearing the browser cache, clearing the java cache, or trying to access from a different PC works - by doing so we can rule out it is a client issue (Java unfortunately seems to behave weird sometimes).
Additionally you may want to SSH into the box and check using "ps ax" if there are mwg-coordinator and java (GUI) processes.
[root@MWG7-2 ~]# ps ax | grep mwg-coordinator
28531 ? Ss 0:00 /opt/mwg/bin/mwg-coordinator -u mwgc:mwg
28532 ? Sl 0:00 /opt/mwg/bin/mwg-coordinator -u mwgc:mwg
28621 pts/0 S+ 0:00 grep mwg-coordinator
[root@MWG7-2 ~]# ps ax | grep java
4587 ? Sl 2:54 /usr/lib/jvm/jre/bin/java -Xmx250m -Dfile.encoding=UTF-8 -Djava.library.path=/usr/lib64 -classpath :/usr/share/mwg-ui/bin/bootstrap.jar:/usr/share/mwg-ui/bin/tomcat-juli.jar:/usr /share/java/commons-daemon.jar -Dcatalina.base=/usr/share/mwg-ui -Dcatalina.home=/usr/share/mwg-ui -Djava.endorsed.dirs= -Djava.io.tmpdir=/usr/share/mwg-ui/temp -Djava.util.logging.config.file=/usr/share/mwg-ui/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager org.apache.catalina.startup.Bootstrap start
28629 pts/0 S+ 0:00 grep java
Also under /opt/mwg/log/mwg-errors/ where are several log files written. mwg-ui and mwg-coordinator logs would be my first place to start looking.
I never saw such behaviour before, unfortunately.
Was this issue resolved at all? If not, I would open a ticket and include a feedback.
As far as I know it was solved by clearing the Java Cache. In case its not, please update this thread.
thanks for your troubleshooting steps and follow ups.
Its was the java cache on the PC running the gui that was cleared
Thanks for sharing Mike!