Error: The Network Adapter could not establish the connection

hi, i am using classes111.zip (the oracle 8.0.5 thin driver) with
linux and gnu jsp pages. the backend is an oracle 8.04 NT
database.
i get this error: "The Network Adapter could not establish the
connection " my question is this - is this error the client
problem or the db server problem. here is the code:
String driverName = "oracle.jdbc.OracleDriver";
String url = "jdbc:oracle:thin:oracle1:1541:ORCL";
String user = "demo";
String pwd = "demo";
String SQL = "";
ResultSet rs;
try
DriverManager.registerDriver(new
oracle.jdbc.driver.OracleDriver());
Connection con = DriverManager.getConnection(url,
user, pwd );
DatabaseMetaData dma = con.getMetaData();
Statement stmt = con.createStatement();
rs = stmt.executeQuery("select * from test");
while(rs.next())
out.println(rs.getString("xx") +
rs.getString("yy"));
catch( SQLException e )
out.println("
error: -> " + e + " <-
exiting
any ideas?
thanks in advance,
steve
null

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Dear all,
I have been trying to connect to Oracle 8 from Java but without success.
I am using the following driver: oracle.jdbc.driver.OracleDriver
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Dear colleague,
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EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
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(PRESENTATION = RO)
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at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:365)
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at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at web.main(web.java:10)
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^C
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asdf
asdf
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Message was edited by: 2a2e67cd-b5b2-4229-9fa6-21f5dfe0760d

Hi Ali,
This may be of varoius reasons..
Is the database that you are connecting on the same PC?
You have specified Hostname: localhost.
If not please replace it with the IP of that server.
Else please check whether the database listener is started or not. if not please start the listener.
Check the SID by tnsping command.
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java.sql.SQLException: IO Error: The Network Adapter could not establish the connectionThis preposterous error message is Oracle's way of saying either 'Connection refused' or 'Connection timeout' or 'no route to host' or 'unknown host'. However because of the stupidity of making up their own message instead of giving the original exception, it is impossible to say which. The pretentious wording is also stupid: network adapters don't create connections. TCP/IP stacks do that.
As to your problem, either there is no such host, no route to the host, nothing listening at the IP:port you specified, or there is a firewall in the way. And that includes a possible Windows firewall on the server host itself.

Error "Io exception: The Network Adapter could not establish the connection

Just now i configured Enterprise Manager in Oracle 10g.
I connect to server via OEM, i can able to connect it.
After logged in when i click on administration tab, it throws an error
"Database Error
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What could be the problem?
Thanks in Advance

Could you please specify the OS you are working with, as well as the exact 10g DB version you are referring to?
~ Madrid

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Are there good questions for me to ask of my DBA or ways to discover what could be causing the issue? Or, is there something I can do on my machine to get around this?

!. Suggest contacting your DBAs first, but Id suggest seeing if the connection is up.
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Jdbc thin error : The Network Adapter could not establish the connection

jdbc thin error : The Network Adapter could not establish the connection
I have been able to create a webservice as per the article Build a PL/SQL Web Service by jason price from otn website. while executing url to call the pl/sql procedure to get the data i am encountering this error
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<?xml version="1.0" encoding="UTF-8" ?>
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<faultcode>SOAP-ENV:Server.Exception:</faultcode>
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<faultactor>/plsqlsample/dbfunc</faultactor>
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The Network Adapter could not establish the connection Error Code: 17002

Hi,
after upgrade b41 to b49, I get error from subject, without any changes in my app.
This occurs only on Oracle AS, on standalone OC4J application works OK.
I use connection defined in persistence.xml:
<non-jta-data-source>jdbc/MyAppDS</non-jta-data-source>
and can successfully test this connection in Enterprise manager.
Also, I tried all tricks mentioned here:
http://www.websina.com/bugzero/kb/oracle-connection.html
I know, that this is JDBC layer problem, but I am sure, that my connection is OK, and
after downgrade to b48 this problem fall away.
Bye,
Lumir

Could you provide the full stack trace to the exception.Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0 (Build b50-beta3 (06/07/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Výjimka vstupu/výstupu: The Network Adapter could not establish the connection
Error Code: 17002
     at oracle.toplink.essentials.exceptions.DatabaseException.sqlException(DatabaseException.java:305)
     at oracle.toplink.essentials.jndi.JNDIConnector.connect(JNDIConnector.java:150)
     at oracle.toplink.essentials.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:185)
     at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.connect(DatasourceAccessor.java:233)
     at oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.connect(DatabaseAccessor.java:242)
     at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.connect(DatasourceAccessor.java:309)
     at oracle.toplink.essentials.threetier.ConnectionPool.buildConnection(ConnectionPool.java:117)
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How have you deployed your application exactly, i.e. what is the structure of your ear. I use standard war for deploy.
Is the DataSource defined in your server, or your application? Defined on server, test on Enterprise manager passed successfully.
Try using a direct JDBC connection in your persistence.xml (driver/url), does this work?Not work, this same exception.
How do you access your entity manager? (managed, non-managed, jta, non-jta?)non-managed, non-jta.
FYI, I make downgrade to build 48, and this works - it is last version without this problem.
I added some tracing code to my SessionCustomizer:customize():
DatabaseLogin login = session.getLogin();
logger.fine("URL is :" + login.getDatabaseURL());
With build 48, connection defined using toplink.jdbc.* , the output is:
07/06/11 10:04:36.218 10.1.3.1.0 Started
07/06/11 10:04:43.593 MyApp: 10.1.3.1.0 Started
07/06/11 10:05:18.578 MyApp: FINE - Customizing session - directProperties
07/06/11 10:05:18.578 MyApp: FINE - URL is :jdbc:oracle:thin:@(DESCRIPTION ... (cut)
07/06/11 10:07:16.875 MyApp: 10.1.3.1.0 Stopped
And after upgrade to build 50:
07/06/11 10:10:12.703 10.1.3.1.0 Started
07/06/11 10:10:30.953 MyApp: 10.1.3.1.0 Started
07/06/11 10:10:52.281 MyApp: FINE - Customizing session - directProperties
07/06/11 10:10:52.296 MyApp: FINER - THROW
Local Exception Stack:
Exception [TOPLINK-28014] (Oracle TopLink Essentials - 2.0 (Build b50-beta3 (06/07/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: Exception was thrown while processing property [toplink.session.customizer] with value [idea.jpa.util.ToplinkSessionCustomizer].
Internal Exception: Exception [TOPLINK-7058] (Oracle TopLink Essentials - 2.0 (Build b50-beta3 (06/07/2007))): oracle.toplink.essentials.exceptions.ValidationException
Exception Description: Invalid Connector [JNDIConnectordatasource name=>null] (must be of type DefaultConnector).
It seems to me, that Login is not properly initialized when app. run in Oracle AS.
Bye,
Lumir

IO Error: The Network Adapter could not establish the connection in oracle

Hi experts,
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user571093 wrote:
Hi experts,
I have oracle developer days installed in my vitrual box machine. The connection to oracle datatase (11.2.0.2) contained in the oracle developer days was working fine via sql developer. I use eclipse to write some java programs to connect the database. However, somehow, I cannot connect the database via sql deveoper anymore. This is the error I got when I tried to connect it via basic connection type:
Status : Failure -Test failed: IO Error: The Network Adapter could not establish the connection
Can anybody shed a light on this issue please. Thanks a lot in advance.Do you realize & understand that we are NOT standing behind you?
I, too, am running Oracle Developer Days inside VirtualBox.
On which system is SQL Developer installed?
The post errors indicate an OS/networking issue.
when was last time all worked without error?
what changed since then?
How do I ask a question on the forums?
SQL and PL/SQL FAQ

SQL error: Io exception: The Network Adapter could not establish the connec

Hi,
I am sure this question has been asked a million times and maybe i haven't searched the forum enough.
But here's the situation. I haven't used oracle too much. So I am not too familiar with data-source and what not..
I downloaded the latest version of oc4j(standalone) a few days back. I am trying to get the Oc4j j2eehome/demo/ormap to work .
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I have no clue what that is..
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Any information will be very helpful.
regards
-amit

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For the container, a default-data-source is defined (ie one to use if no others are supplied) in the j2ee/home/config/application.xml.
<orion-application autocreate-tables="false"
default-data-source="jdbc/OracleDS">
To make it work simply, make sure that you have a datasource named jdbc/OracleDS defined in the data-sources.xml file (which should be there as a template) and that the connection details for it point to a valid database instance and user.
cheers
-steve-

JDBC Error - The Network Adapter could not establish the connection

Hi all,
I appreciate if anyone could help me out with my issue. I wrote simple java code on win 2000 to test whether I will be able to access Oracle 8i DB resided at some xxx.xxx.xxx.xxx machine within the network.
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The fist line here is executing and the problem is with second line of code. After executing this application from my DOS window, I am getting error:
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at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:211)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:324)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:266)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:365)
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at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at DBConn.getConn(DBConn.java:15)
at DBConn.main(DBConn.java:40)
I have installed Oracle client, where I can access the same database using SQL * Plus, but why I am unable to access the database from a Java Application? Do I need any web/application server to access it?
Any suggestions please?
Thanks,
cs

I am sorry guys, I was using the port number as 1526, where I need to use 1521...

IO Error: The Network Adapter could not establish the connection

Hi,
when iam trying to connect the db with new connection, new port etc.. it's showing that network adapter could not established, please help me in connecting to db.
Regards,
sirisha

See The Network Adapter could not establish the connection.

Error: The Network Adapter could not establish the connection

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