JBoss EAP failed to start due to Port already in use.

Issue

• During start up the JBoss EAP instance, it throws an error "Port 8083 already in use".
• Errors coming while trying to start Jboss 5.1 JVM

Error in logs:-
DEPLOYMENTS MISSING DEPENDENCIES:
  Deployment "jboss.web.deployment:war=/ROOT" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/admin-console" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/invoker" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/jbossws" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/jmx-console" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/ABC" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")
  Deployment "jboss.web.deployment:war=/web-console" is missing the following dependencies:
    Dependency "jboss.web:service=WebServer" (should be in state "Create", but is actually in state "** NOT FOUND Depends on 'jboss.web:service=WebServer' **")

DEPLOYMENTS IN ERROR:
  Deployment "WebServer" is in error due to the following reason(s): LifecycleException:  Protocol handler initialization failed: java.lang.Exception: Socket bind failed: [125] Address already in use
  Deployment "jboss.web:service=WebServer" is in error due to the following reason(s): ** NOT FOUND Depends on 'jboss.web:service=WebServer' **

User does not see any port conflicting with other JVM.

• Unable to start the JBoss EAP 5 due to Port 8083 already in use. How to resolve this issue ?

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.
       at org.jboss.web.WebServer.start(WebServer.java:233)