Port 8083 already in use

Document ID : KB000095488
Last Modified Date : 11/05/2018
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Issue:
After installing the PAM, PAM service could not start and c2o.log has below error::
"ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] [ main] Error installing to Start: name=jboss:service=WebService state=Create mode=Manual requiredState=Installed 
java.lang.Exception: Port 8083 already in use"
Environment:
PAM version: 4.3.2
OS: RHEL 7.4
Cause:
System hosts file(/etc/hosts) contains invalid IP Address
Resolution:
1.Open the system hosts file
    /etc/hosts
    Check whether it has the valid IP Address of the system or not and correct it if needed and save.
2. Restart the PAM service.