Solution:
Linux System: Use shutdownApplicationsManager.sh with -force option found under Applications Manager home (Execute command : "sh shutdownApplicationsManager.sh -force" ) and use startApplicationsManager.sh.
Windows System : Use shutdownApplicationsManager.bat with -force option found under Applications Manager home. If Applications Manager is installed as service, stop the Apache server in the services list (ApacheApplicationsManager) and usestartApplicationsManager.bat. If none of the above options are working send Support Information File to appmanager-support@manageengine.com