Cannot connect to database from a client machine (ORA-12154)

Hi,
I have installed Oracle XE Server on one of my machines and Oracle XE Client on another. When I try to connect to the server from the client using command line, error ORA-12154 is displayed. I am pasting the data of my .ora files so that you can point out the errors if any in these files.
Listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = abo-server.abosoftware.org)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
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)
Tnsnames.ora
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = abo-server.abosoftware.org)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
I will be very happy if anyone can suggest me a solution.
Thanks & Regards,
Harshad

Harshad,
CONNECT system/[email protected]
This was not what I asked you to try, this cannot work ;).
I asked you to try :
connect system/[email protected]:1521/XE
I have also tried accessing the database homepage remotely using the url
http://abo-server.abosoftware.org:8080/apex
Per default only local access (from the same machine) is allowed via http.
You can change that either via the GUI (log in as SYSTEM):
Home>Administration>Manage HTTP Access
OR
connect as SYSTEM via sqlplus and run:
SQL>exec dbms_xdb.setListenerLocalAccess(false);###
It is documented at
http://download-west.oracle.com/docs/cd/B25329_01/doc/install.102/b25144/toc.htm#BABIJBHJ
And yes, you need to open both ports 1521 and 8080 to access it remotely.
~Dietmar.

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==============================================================
C:\Users\jchen>tnsping jchen_dev
TNS Ping Utility for 32-bit Windows: Version 11.2.0.1.0 - Production on 20-MAY-2011 11:55:49
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Copyright (c) 1997, 2009, Oracle. All rights reserved.
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Any help is highly appreciated!
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DETAILS:
PC configuration: Win2k+SP4, 512Mb, Outpost Firewall (disabled!), No another Oracle products being installed.
TNSNAMES.ORA file:
************* BEGIN TNSNAMES *****************************************
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = pz)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
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(PRESENTATION = RO)
************* END OF TNSNAMES *****************************************
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************* BEGIN STATUS *****************************************
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
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Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Prod
ction
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Uptime 0 days 1 hr. 8 min. 53 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
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Listener Parameter File D:\oracle\ora10xe\app\oracle\product\10.2.0\server\ne
work\admin\listener.ora
Listener Log File D:\oracle\ora10xe\app\oracle\product\10.2.0\server\ne
work\log\listener.log
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(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=pz)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation
HTTP)(Session=RAW))
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Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
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Instance "xe", status READY, has 1 handler(s) for this service...
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
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************* END OF STATUS *****************************************
NETSTAT -an results:
************* BEGIN NETSTAT *****************************************
Proto Local Address Foreign Address State
TCP 0.0.0.0:1521 0.0.0.0:0 LISTENING
TCP 0.0.0.0:2298 0.0.0.0:0 LISTENING
TCP 127.0.0.1:2455 127.0.0.1:8080 ESTABLISHED
TCP 127.0.0.1:8080 0.0.0.0:0 LISTENING
TCP 127.0.0.1:8080 127.0.0.1:2382 CLOSE_WAIT
TCP 127.0.0.1:8080 127.0.0.1:2455 ESTABLISHED
TCP 192.168.200.49:1521 192.168.200.49:2298 ESTABLISHED
TCP 192.168.200.49:2298 192.168.200.49:1521 ESTABLISHED
<truncated>
************* END OF NETSTAT *****************************************
I found following error in SQLNET.LOG:
*************** START LOG *********************************************
Fatal NI connect error 12570, connecting to:
(LOCAL=NO)
VERSION INFORMATION:
     TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
     Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production
     Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production
Time: 22-MAR-2006 17:28:59
Tracing not turned on.
Tns error struct:
ns main err code: 12570
TNS-12570: TNS:packet reader failure
ns secondary err code: 12560
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
*************** END OF LOG *******************************************

I successfully connect with XE client to another Oracle databases from LAN, including 8i and 9i databases.
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Prabhu wrote:
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TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 06-AUG-2
008 10:10:02
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
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SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug 6 10:10:06 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
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Regards,
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ERROR:
ORA-12154: TNS:could not resolve the connect
identifier specified
C:\Documents and Settings\Administrator>sqlplus
cms/cms@myc10a
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Aug
6 10:10:06 2008
Copyright (c) 1982, 2005, Oracle. All rights
reserved.
ERROR:
ORA-12154: TNS:could not resolve the connect
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All tnsnames.ora entries look like
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Suggest you post the tnsnames.ora and the sqlnet.ora
(And yes, I have that configuration working.)
Message was edited by:
Hans Forbrich

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int a = 0;
a= mybean.add(10,15);
wdContext.currentContextElement().setSum(a);
where MyEJB is my EJB name and MyJndi is my JNDI name
To connect to Oracle , you can write the usual Java code (given below) as a business methos of the ejb (similar to add() method in the example). And access it like mybean.<businessMethodName>().
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@Oracle_server_ip:Oracle port:SID of the Database","user_name","password");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("your query");
Extracted from Re: Webdynpro and Oracle
http://help.sap.com/saphelp_webas630/helpdata/en/b0/6e62f30cbe9e44977c78dbdc7a6b27/frameset.htm
May be of use to understand the VA Conf /people/varadharajan.krishnasamy/blog/2007/02/27/configuring-jdbc-connector-service-to-perform-database-lookups
Regards
Ayyapparaj

Cannot Connect to Database LS

Hi, i have som problems connecting to database:
Case 1:
I've moved a IIS from one datacenter to another one. (installed all new)
On VS, after install LS and all of the componets, can install good an APP, from my laptop. (using publish directly (webdeploy)) .
And, installation creates a new database on my SQL (another machine ).
I've installed my application on my laptop, and then when i open, application says Error Comunicating with database.
From my VS, works fine.
Scenario:
My Location (one External IP)
DataCenter (one external IP for IIS) (with NAT directly to WEB SERVER (has internal IP)) And SNAT to same IP External (NO FIREWALL )
Datacenter (one External IP for SQL) (With NAT directly to SQL Server) And SNAT to same IP External (NO FIREWALL)
All configuration on Web.Config calls externals IP .
WEBSERVER AND SQLSERVER (has on the same network, with IP RANGE 192.168.10.X)
I've tested to put in web.config internal address (and then open application directly from WEBSERVER) and works fine.
Problem it's external connection, but... i can connect to database from VS and from SSMS from My laptop...

HI Ivan,
From your description above, here are some suggestions for you.
1. Ping the external server using its IP address, and check whether it is fine;
2. Check whether you use the correct connection string;
If you have checked the items above, perhaps this is permission issue. You can use SQL Server authentication, and check whether it makes any difference.
Best regards,
Angie
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Cannot connect to database host...

Hello,
First, I want to say i'm not so good in english that's why i'm apologies for this.
I try to use Sun VDI, my computer doesn't work in 64 bits that's why i use this product in 32 bits so I'm in a product envionnement.
I've installed A mysql 5 server in a 2003 server with php, phpmyadmin to see database, and when i install sun vdi in my solaris 10 i have this error message:
Cannot connect to database host...ip:3306 as user root, but when i've install mysql i've just root for user and i use this he work, and i use this login to connect in my database.
What can Have to do now? My port is really 3306 when i install mysql and the two machine is in the same network, ping work.
Thanks for yours futur answers
Regards,

Select (1/2/0) : 1
Specify an administrator password: (in my case) xxxxxxxx _(password of my sql)_ <------ This is wrong. This can be any desired admin password.
specify a cluster signature: 7727kkkk
again
you can only connect to a remote MYSQL database in a 32-bit system.
Continue? (y/n): y
Enter the dns name of mysql server: _192.168.168.165_ <------- This is wrong. This is an IP address and not a DNS name (not sure if that is really a problem here).
Enter the port of mysql server : 3306
enter mysql priviliged administrator: root_ <------- This is wrong. Here you have to enter the admin user name of your database.
enter mysql priviliged administrator password: xxxxxxxx_ <------- Here you enter the corresponding password for this user (so password of your MySQL account)
Do you want to use a Socket secure layer (ssl) connection for '192.168.168.165'? (yn): n
Cannot connect to database host 192.168.168.x:3306 as user 'root'
Please make you shure connexion daitels you have provided are correct
Where i have wrong please?

Cannot connect to database via JApplet

Hi,
I created a Java application which allows me to send information to my mysql database using the jdbc connector via a JFrame. However when i modified the file to be a JApplet the info will not sent and i cannot connect to the database? Any particular reason for this?
I need it to be a JApplet so i can add it to a browser window.
Code: ( java )
private void save ()
Connection conn = null;
try
Statement stmt;
String userName = "root";
String password = "PASSWORD";
String url = "jdbc:mysql://localhost:3306/DATABASE";
Class.forName ("com.mysql.jdbc.Driver").newInstance ();
conn = DriverManager.getConnection (url, userName, password);
System.out.println ("Database connection established");
//Get a statement object
stmt = conn.createStatement();
stmt.executeUpdate( "INSERT INTO TABLE(Info i know to put in) VALUES('Values i know to put in')");
catch (Exception e)
System.err.println ("Cannot connect to database server");
finally
{if (conn != null)
{try
{conn.close ();
System.out.println ("Database connection terminated");
catch (Exception e) { /* ignore close errors*/ }
As i said above it works fine as a JFrame but not as a JApplet. Any help would be great.
Thanks G

Your error reporting is not good. You print a meanningless message or ignore the error.
Print the stacktrace in the catch blocks.
Change the code, rerun it and then check the Java Console for output.
I'm guessing you'll see a security error. Unsigned applets can't access the client file system. If so, sign the applet.

Cannot connect to Database attempts hang (no errors)

hi, i have oracle 9.2 on solaris 5.8
weirdly, today we could not connect the db anymore. even these does not work on the server:
sqlplus /nolog
SQL> connect /as sysdba
sqlplus "/ as sysdba"
sqlplus system/**
ALL attemps just hang , no errors.
what can i do?
i think the only way is reboot the machine?
any ideas?

here is the output
bash-2.05# vmstat 2 20
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr f0 m0 m1 m2 in sy cs us sy id
0 0 0 1940080 1012952 9 25 51 0 0 0 0 0 7 5 7 729 777 245 15 3 82
0 0 0 1828840 855200 0 4 0 0 0 0 0 0 386 7 387 5626 62112 3614 25 40 35
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 384 7 384 5611 62299 3786 23 40 37
0 1 0 1828840 855200 0 0 0 0 0 0 0 0 372 6 373 5582 63459 3754 24 39 37
0 2 0 1828840 855200 0 0 0 0 0 0 0 0 391 7 391 5640 63245 3976 23 38 40
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 374 18 374 5789 61626 3760 24 37 3
9
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 373 7 373 5536 62333 3888 20 47 34
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 376 7 376 5585 62463 3594 24 42 35
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 354 8 354 5364 61787 3396 24 41 36
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 378 7 378 5616 61667 3777 18 47 35
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 364 11 364 5494 63075 3616 24 40 3
6
0 2 0 1828840 855200 0 0 0 0 0 0 0 0 388 8 388 5733 62161 3947 22 39 39
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 388 8 388 5702 61873 4142 22 43 35
0 1 0 1828840 855200 0 0 0 0 0 0 0 0 383 7 383 5584 63365 3815 28 33 40
1 0 0 1828840 855200 0 0 0 0 0 0 0 0 387 7 387 5643 63920 3846 29 29 41
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 378 10 378 5650 61793 3914 23 40 3
6
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 388 7 389 5644 62798 4064 24 36 40
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 377 11 377 5592 62206 3941 23 47 3
0
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 379 8 380 5605 61121 3959 21 50 29
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr f0 m0 m1 m2 in sy cs us sy id
0 0 0 1828840 855200 0 0 0 0 0 0 0 0 379 7 379 5511 61964 3549 19 46 35
Also, i cannot connect the database, i dont have any active connections, cannot run any sql statements..

Cannot connect to database from a client machine (ORA-12154)

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