Hi
By reading this post, the problem is with the System Agent, because you said:
1) Issue was happened when i'm not able to stop an agent using command unisrvcntr stop all
2) and also i have tried using script called ./cybAgent -s
3) to stop it but no luck, so i have killed the process
Here it means that the System Agent is
1) either very busy and it takes a long time to stop it. Sometimes and depending on the activity it can can several minutes ( 2 or 3 minutes)
2) or it is stuck
If the process is stuck, depending on the platform you can take a dump of the process with several methods, gencore command, jstack command, kill -3 pid
But in any case,open a CA support case, then when the process is stuck, gather the following documentation before restarting the System Agent:
1) all the files from the log directory of the system agent
2) both the nohup.* files, if there are not empty, you can find in the installation directory of the System Agent
3) the agentparm.txt file
4) the output of cybagent -vv
5) get the pid of cybAgent.bin and run: jstack PID
Regards
Jean Paul