Output tnsping $TWO_TASK

[oracle@wtnoraerp1:/DB/EBS/APPS/fs1/inst/apps/PROD_wtnoraerp1/admin/scripts]$ tnsping $TWO_TASK

TNS Ping Utility for Solaris: Version 10.1.0.5.0 - Production on 04-NOV-2017 11:07:53

Copyright (c) 1997, 2003, Oracle.  All rights reserved.

Used parameter files:


Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=wtnoraerp1)(PORT=1526)) (CONNECT_DATA=(SID=PROD)))
OK (0 msec)


=============================================

Output of sqlplus apps/apps_password

[oracle@wtnoraerp1:/DB/EBS/APPS/fs1/inst/apps/PROD_wtnoraerp1/admin/scripts]$ sqlplus apps/apps

SQL*Plus: Release 10.1.0.5.0 - Production on Sat Nov 4 11:11:26 2017

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

ERROR:
ORA-12505: TNS:listener does not currently know of SID given in connect
descriptor

======================================================

Output of DB listner status

[oracle@wtnoraerp1:/DB/PROD/12.1.0/appsutil/scripts]$ lsnrctl status PROD

LSNRCTL for Solaris: Version 12.1.0.2.0 - Production on 04-NOV-2017 12:07:18

Copyright (c) 1991, 2014, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=wtnoraerp1-vip.rchsp.med.sa)(PORT=1526)(IP=FIRST)))
STATUS of the LISTENER
------------------------
Alias                     PROD
Version                   TNSLSNR for Solaris: Version 12.1.0.2.0 - Production
Start Date                03-NOV-2017 16:39:02
Uptime                    0 days 19 hr. 28 min. 15 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /DB/PROD/12.1.0/network/admin/PROD1_wtnoraerp1/listener.ora
Listener Log File         /DB/PROD/diag/tnslsnr/wtnoraerp1/prod/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.80.5.13)(PORT=1526)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.80.5.11)(PORT=1526)))
Services Summary...
Service "PROD1" has 1 instance(s).
  Instance "PROD1", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully