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The symptom is found by checking the application-error.log and seeing Java socket failures because tomcat isn't running.
Solution:
1.- Edit the following file in a text editor/svc/tomcat/conf/server.xml.dist and set SSLEngine=off
Then stop Services, do a service configure and them service start
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2.- Stop Services by going into the CIP Shell and running the command service stop, wait for all processes to stop, this can be checked by running the command ps, the only process left should be the CIP Shell process.
3.- Reconfigure Services by running the command service configure so the changes we made to the file take place.
4.- Restart Services by running the command service start.
Done!
A software upgrade fixes this too but for a system that’s down system it’s best to just hot fix it .
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by following the instructions above.