How to resolve TNS-12537: TNS:connection closed

Question

sqlnet.ora
==========
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES = (NTS)
#SQLNET.AUTHENTICATION_SERVICES = (ALL)
tnsname.ora
===========
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
listener.ora
========
# listener.ora Network Configuration File: D:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
while trying to connect into my local database(ORCL),I am receiving the following error:
C:\Documents and Settings\abcd>tnsping orcl
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 07-JUN-2
012 11:16:44
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
D:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)
(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = ORCL)))
TNS-12537: TNS:connection closed
Thanks in advance.

Answer 1

Hi,
In your tnsnames.ora description ORCL.
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = ORCL)
) Did you create any database on localhost (HOST = 127.0.0.1)?
I think , if you want you must create database on localhost with IP 127.0.0.1
else if you want connect exists database with service name ORCL then you must change IP address
for ORCL description in tnsname.ora (for expale HOST= ORCLHOST or IP )
regards
Mahir M. Quluzade
www.mahir-quluzade.com