Error connecting to database thru tnsnames.ora in linux

Question

Hi,
I can connect to database using service and port. Now i want to connect using the tnsnames. The following code returns error.
import java.sql.;*
import oracle.jdbc.OracleDriver;
import oracle.jdbc.pool.OracleDataSource;
public class Test
public Test()
System.setProperty("oracle.net.tns_admin","\oracle\product\TNS");
public static Connection getConnection() throws SQLException
OracleDataSource ds = new OracleDataSource();
ds.setTNSEntryName("CMAD");
ds.setDriverType("thin");
ds.setUser("scott");
ds.setPassword("tiger");
Connection conn = ds.getConnection();
return conn;
public void run () throws SQLException
Connection conn = getConnection();
System.out.println("Check Auto Commit = " + conn.isClosed());
conn.close();
public static void main(String[] args)
Test test = new Test();
try
test.run();
System.out.println("all done..");
catch (SQLException e)
e.printStackTrace();
\oracle\product\TNS is the place where my tnsnames.ora is stored and is set as TNS_ADMIN path in linux
I encounter the follwing error while running the class file of above code
java.sql.SQLException: Io exception: SO Exception was generated
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:124)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:161)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:273)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:327)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:365)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:150)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:31)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:563)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:195)
at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:145)
at Test.getConnection(Test.java:41)
at Test.run(Test.java:47)
at Test.main(Test.java:57)
Could someone help me? What is a SO exception?
Thanks in advance.
Allen

Answer 1

Hi,
Socket exception?
What does your CMAD TNS entry look like?
Regards
Peter