Error in Installing R12.1.1 Oracle Applications in Final Step 5

Recently faced the issue while installing R12.1.1 installtion. After final steps of R12.1.1 installations, Faced the below error in Final Screenshot.

HTTP
-----
   checking URL = http://localhost.localdomain:8000
   RW-50015: Error: - HTTP Listener is not responding. The service might not have started on the port yet. Please check the service and use the retry button.
Help Page
----------
checking URL = http://localhost.localdomain:8000/OA_HTML/help
   RW-50015: Error: - Help Page is not responding. The service might not have started on the port yet. Please check the service and use the retry button.
Virtual Directory
------------------
   RW-50015: Error: - Http Server Virtual Directories is not responding. The service might not have started on the port yet. Please check the service and use the retry button.
JSP
----
   checking URL = http://localhost.localdomain:8000/OA_HTML/jtfTestCookie.jsp
   RW-50015: Error: - JSP is not responding. The service might not have started on the port yet. Please check the service and use the retry button.
Login Page
-----------
   RW-50015: Error: - Login Page is not responding. The service might not have started on the port yet. Please check the service and use the retry button.

I checked the application installation log file(/apps/inst/apps/TEST_localhost/logs/05030038.log).the above error was there.. while again investing the log file, observed that
the autoconfig was failing. So checked the autoconfig logfile (/apps/inst/apps/TEST_localhost/admin/log/05030620/adconfig.log), The below error was found.

[CVM Error Report]
The following report lists errors encountered during CVM Phase
      <filename>  <return code where appropriate>
  /apps/apps/apps_st/appl/ad/12.0.0/bin/adgentns.pl  -1
No of scripts failed in CVM phase: 1
AutoConfig is exiting with status 1

I didn't find the exact hit on support.oracle.com , so plan to run the perl scripts manually which was failing..SO ran the perl scripts and it autoconfig got successful.and click the
retry button of R12 Installtion screen, it got successful.

[applmgr@localhost bin]$ perl adgentns.pl contextfile=/apps/inst/apps/TEST_localhost/appl/admin/TEST_localhost.xml  appspass=apps
##########################################################################
                   Generate Tns Names
##########################################################################
Logfile:  /apps/inst/apps/TEST_localhost/admin/log/05030918/NetServiceHandler.log
        Classpath                   : /apps/apps/apps_st/comn/java/lib/appsborg2.zip:/apps/apps/apps_st/comn/java/classes
Updating s_tnsmode to 'generateTNS'
UpdateContext exited with status: 0
adgentns.pl exiting with status 0
ERRORCODE = 0 ERRORCODE_END