Hi Troy,
We have 3 DC out of which 1 is currently showing as 'not connected' in the PC Console GUI. Below is the output of service dcmd status and ps -ef | grep apache pasted for ref.
pmadmin@inp44vpehcol1 apache-karaf-2.4.3]$ ps -ef | grep apache
pmadmin 19641 1 2 Jul19 ? 00:46:53 /opt/IMDataCollector/jre/bin/java -Xms500M -Xmx1000M -Xmn250M -server -XX:SurvivorRatio=6 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:TargetSurvivorRatio=90 -XX:InitialTenuringThreshold=15 -XX:MaxTenuringThreshold=15 -XX:+ScavengeBeforeFullGC -XX:+ExplicitGCInvokesConcurrent -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+CMSClassUnloadingEnabled -Djava.util.logging.config.file=logging.properties -Djava.security.auth.login.config=/opt/IMDataCollector/broker/apache-activemq-5.15.2/conf/login.config -Dcom.sun.management.jmxremote -Djava.awt.headless=true -Djava.io.tmpdir=/opt/IMDataCollector/broker/apache-activemq-5.15.2//tmp -Dactivemq.classpath=/opt/IMDataCollector/broker/apache-activemq-5.15.2//conf:/opt/IMDataCollector/broker/apache-activemq-5.15.2//../lib/: -Dactivemq.home=/opt/IMDataCollector/broker/apache-activemq-5.15.2/ -Dactivemq.base=/opt/IMDataCollector/broker/apache-activemq-5.15.2/ -Dactivemq.conf=/opt/IMDataCollector/broker/apache-activemq-5.15.2//conf -Dactivemq.data=/opt/IMDataCollector/broker/apache-activemq-5.15.2//data -jar /opt/IMDataCollector/broker/apache-activemq-5.15.2//bin/activemq.jar start
pmadmin 25714 1 99 Jul19 ? 3-07:38:06 /opt/IMDataCollector/jre/bin/java -Xms1024M -Xmx5252M -server -Xms1024M -Xmx5252M -XX:+UnlockDiagnosticVMOptions -XX:+UnsyncloadClass -Dcom.sun.management.jmxremote -XX:NewRatio=3 -XX:SurvivorRatio=6 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:TargetSurvivorRatio=50 -XX:InitialTenuringThreshold=15 -XX:MaxTenuringThreshold=15 -XX:+ScavengeBeforeFullGC -XX:+ExplicitGCInvokesConcurrent -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+CMSClassUnloadingEnabled -Djava.endorsed.dirs=/opt/IMDataCollector/jre/jre/lib/endorsed:/opt/IMDataCollector/jre/lib/endorsed:/opt/IMDataCollector/apache-karaf-2.4.3/lib/endorsed -Djava.ext.dirs=/opt/IMDataCollector/jre/jre/lib/ext:/opt/IMDataCollector/jre/lib/ext:/opt/IMDataCollector/apache-karaf-2.4.3/lib/ext -Dkaraf.instances=/opt/IMDataCollector/apache-karaf-2.4.3/instances -Dkaraf.home=/opt/IMDataCollector/apache-karaf-2.4.3 -Dkaraf.base=/opt/IMDataCollector/apache-karaf-2.4.3 -Dkaraf.data=/opt/IMDataCollector/apache-karaf-2.4.3/data -Dkaraf.etc=/opt/IMDataCollector/apache-karaf-2.4.3/etc -Dda.data.home=/opt/IMDataCollector/apache-karaf-2.4.3/da_data -Dda.version=1.0.0.0 -Djava.io.tmpdir=/opt/IMDataCollector/apache-karaf-2.4.3/data/tmp -Djava.util.logging.config.file=/opt/IMDataCollector/apache-karaf-2.4.3/etc/java.util.logging.properties -XX:+HeapDumpOnOutOfMemoryError -Dorg.apache.activemq.SERIALIZABLE_PACKAGES=* -XX:OnOutOfMemoryError=/opt/IMDataCollector/apache-karaf-2.4.3/bin/restart -Dkaraf.startLocalConsole=false -Dkaraf.startRemoteShell=true -classpath /opt/IMDataCollector/apache-karaf-2.4.3/lib/karaf-jaas-boot.jar:/opt/IMDataCollector/apach-karaf-2.4.3/lib/karaf.jar:/opt/IMDataCollector/apache-karaf-2.4.3/lib/karaf-wrapper.jar org.apache.karaf.main.Main
pmadmin 40813 40781 0 18:33 pts/1 00:00:00 grep --color=auto apache
pmadmin@inp44vpehcol1 ~]$ service dcmd status
Redirecting to /bin/systemctl status dcmd.service
● dcmd.service - Data Collector
Loaded: loaded (/etc/systemd/system/dcmd.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2018-07-19 16:35:17 IST; 1 day 1h ago
Process: 25569 ExecStop=/opt/IMDataCollector/scripts/dcmd stop sysd (code=exited, status=0/SUCCESS)
Process: 25661 ExecStart=/opt/IMDataCollector/scripts/dcmd start sysd (code=exited, status=0/SUCCESS)
Tasks: 781
Memory: 5.6G
CGroup: /system.slice/dcmd.service
├─25691 /opt/IMDataCollector/ICMPD/IcmpDaemon --start
└─25714 /opt/IMDataCollector/jre/bin/java -Xms1024M -Xmx5252M -server -Xms1024M -Xmx5252M -XX:+UnlockDiagnosticVMOptions -XX:+UnsyncloadClass -Dcom.sun.management.jmxremote -XX:NewRatio=3 -XX:Survi...
[pmadmin@inp44vpehcol1
In this situation how to know if DC is really collection data or not?