Hossam,
Looks like your events-service is down and so can you please start it up manually using the below command
cd <events_service_install_dir>
nohup bin/events-service.sh start -p conf/events-service-api-store.properties &
In case if it fails to start, you can refer the below KB article to see if you are running into the same issue as described in this
https://community.appdynamics.com/t5/Knowledge-Base/Unable-to-start-events-service-after-abrupt-shut...
Regards,
Mohammed Rayan
