Oracle 11g Agent Connection to Instance Status Failed

Question

I was installing the Oracle 11g Standard Edition by using below URL :

http://dbaora.com/install-oracle-11g-release-2-11-2-on-centos-linux-7/

After installation is completed all is good I can able to access my DB Console by using my username/password with http://tsm.aitc.local:1158/em URL.

But when I reboot my Server(CentOS 7) and run below command

lsnrctl start LISTENER
emctl start dbconsole

Then try to hit below URL

http://tsm.aitc.local:1158/em

Then I am getting below error message on DB Console.

I am using CentOS 7 and Oracle 11g.

Answer 1

Check configuration of $ORACLE_HOME/$INSTANCE/sysman/config/emoms.properties

Review things started with oracle.sysman.eml.mntr.*