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Sometimes the GRID CONTROL agent will not start because an old HTTP process is still running on the host – this usually happens if the agent has crashed for any reason.

Example –

Check status of agent.

oracle(DATABASE)@hostname:./emctl status agent
Oracle Enterprise Manager 10g Release 4 Grid Control 10.2.0.4.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
—————————————————————
Agent is Not Running

START AGENT –

oracle(DATABASE)@fhostname:./emctl start agent
Oracle Enterprise Manager 10g Release 4 Grid Control 10.2.0.4.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.
Starting agent …… failed.
Failed to start HTTP listener.
Consult the log files in: /u01/oracle/agent10g/sysman/log

To solve the problem.

CHECK IF PORT 3872 – PORT USED BY AGENT IS IN USE.

oracle(DATABASE)@hostname:netstat -an | grep 3872
tcp4 0 0 *.3872 *.* LISTEN

oracle(DATABASE)@hostname:ps -ef | grep emagent
oracle 864486 1 0 Jan 27 – 5:36 /u01/oracle/agent10g/perl/bin/perl /u01/oracle/agent10g/bin/emwd.pl agent /u01/oracle/agent10g/sysman/log/emagent.nohup
oracle 1593344 864486 0 Jan 27 – 97:38 /u01/oracle/agent10g/bin/emagent

KILL ALL EMAGENT PROCESSES STILL RUNNING –

oracle(DATABASE)@hostname:ps -ef | grep emagent | awk ‘ {print $2}’ | xargs kill -9

oracle(DATABASE)@hostname:ps -ef | grep emagent| grep -v grep

No emagent process running now.

cd $AGENT_HOME/bin

oracle(DATABASE)@hostname:pwd
/u01/oracle/agent10g/bin

START AGENT

oracle(DATABASE)@hostname:./emctl start agent
Oracle Enterprise Manager 10g Release 4 Grid Control 10.2.0.4.0.
Copyright (c) 1996, 2007 Oracle Corporation. All rights reserved.

AGENT WILL START.

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Last Update: May 30, 2020  

July 28, 2009 130 Arjun Raja
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