Possible port conflict on port(3872): Retrying the operation...

Oracle Grid agent Error:

emctl start agent

Oracle Enterprise Manager Cloud Control 12c Release 2

Copyright (c) 1996, 2012 Oracle Corporation. All rights reserved.

Starting agent ..................... failed.

HTTP Listener failed at Startup

Possible port conflict on port(3872): Retrying the operation...

Failed to start the agent after 1 attempts. Please check that the port(3872) is available.

Consult emctl.log and emagent.nohup in: /oracle/app/12c_agent1/agent_inst/sysman/log

 Solution:

So check whether any other application is using the port 3872 by using below command and take action accordingly.

netstat -Aan |grep 3872

 (Or)

Chang "ListenOnAllNICs=false" in emd.properties.

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