Connecting Weblogic 8.1 to Oracle 10g

Question

Hi,
I have created connection in weblogic 8.1 of a type4 driver. And associated that connection with a JNDI name and DataSource. And I'm looking up that jndi and getting the connection. It is connecting but when executing the statement it is throwing exception. Please adivce. Thanks.
Both code and exception are below:
Here is the Program:
public class JDBCConnectionPool {
     Connection connection = null;
     InitialContext initialContext = null;
     Context context = null;
     DataSource datasource = null;
     Properties properties = null;
     public Connection getConnection() {
          properties = new Properties();
          properties.put(Context.INITIAL_CONTEXT_FACTORY,
                    "weblogic.jndi.T3InitialContextFactory");
          properties.put(Context.PROVIDER_URL, "t3://CBR-SRV-HPORA:7001/");
          try {
               initialContext = new InitialContext(properties);
               datasource = (DataSource) initialContext.lookup("sample_jndi");
               try {
                    connection = datasource.getConnection();
               } catch (SQLException e) {
                    e.printStackTrace();
          } catch (NamingException e) {
               e.printStackTrace();
          return connection;
     public static void main(String args[]) throws SQLException {
          JDBCConnectionPool conpool = new JDBCConnectionPool();
          Connection con = conpool.getConnection();
          if (con != null) {
               System.out.println("Connected.........");
               Statement stmt = con.createStatement();
               ResultSet rs = stmt.executeQuery("SELECT ENAME FROM EMP");
               while (rs.next()){
               System.out.println(rs.getString("ENAME"));
Here is the EXCEPTION:
Connected.........
<Jun 15, 2010 4:42:20 PM IST> <Info> <JDBC> <BEA-001155> <The following exception has occurred:
java.rmi.UnmarshalException: Could not unmarshal method ID; nested exception is:
     java.rmi.UnmarshalException: Method not found: 'createArrayOf(Ljava.lang.String;[Ljava.lang.Object;)'
     at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
     at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:164)
     at weblogic.jdbc.rmi.internal.ConnectionImpl_weblogic_jdbc_wrapper_PoolConnection_weblogic_jdbc_oracle_OracleConnection_816_WLStub.createStatement(Unknown Source)
     at weblogic.jdbc.rmi.SerialConnection.createStatement(SerialConnection.java:157)
     at com.code.sample.connectionDB.JDBCConnectionPool.main(JDBCConnectionPool.java:54)
Caused by: java.rmi.UnmarshalException: Method not found: 'createArrayOf(Ljava.lang.String;[Ljava.lang.Object;)'
     at weblogic.rmi.internal.MethodDescriptor.init(MethodDescriptor.java:156)
     at weblogic.rmi.internal.BasicServerRef.dispatch(BasicServerRef.java:272)
     at weblogic.rjvm.RJVMImpl.dispatchRequest(RJVMImpl.java:1114)
     at weblogic.rjvm.RJVMImpl.dispatch(RJVMImpl.java:1032)
     at weblogic.rjvm.ConnectionManagerServer.handleRJVM(ConnectionManagerServer.java:225)
     at weblogic.rjvm.ConnectionManager.dispatch(ConnectionManager.java:809)
     at weblogic.rjvm.t3.T3JVMConnection.dispatch(T3JVMConnection.java:782)
     at weblogic.socket.NTSocketMuxer.processSockets(NTSocketMuxer.java:105)
     at weblogic.socket.SocketReaderRequest.execute(SocketReaderRequest.java:32)
     at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
     at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
--------------- nested within: ------------------
weblogic.rmi.extensions.RemoteRuntimeException: Unexpected Exception - with nested exception:
[java.rmi.UnmarshalException: Could not unmarshal method ID; nested exception is:
     java.rmi.UnmarshalException: Method not found: 'createArrayOf(Ljava.lang.String;[Ljava.lang.Object;)']
     at weblogic.jdbc.rmi.internal.ConnectionImpl_weblogic_jdbc_wrapper_PoolConnection_weblogic_jdbc_oracle_OracleConnection_816_WLStub.createStatement(Unknown Source)
     at weblogic.jdbc.rmi.SerialConnection.createStatement(SerialConnection.java:157)
     at com.code.sample.connectionDB.JDBCConnectionPool.main(JDBCConnectionPool.java:54)
>

Answer 1

Hi,
Please try to use the ojdbc14.jar Oracle Jdbc Driver ...which comes with WebLogic8.1 SP6 Installation and Placed inside the following Location:
C:\bea816\weblogic816\server\lib\ojdbc14.jar
Please remove any additional ojdbc14.jar from the Server Classpath if u are using any new version of this Jar. Looks like ur Servers Classpath has some very Latest Oracle Jdbc Driver which is causing the issue.
<b><font color=maroon>
One more thing ..As i dont see any Oracle Jdbc Driver class in the Stack trace ....so i m not 100% sure that it is a Driver issue...
But Please check if u have applied any Wrong Patch in the Server Classpath... Because the Stack trace clearly says that ...somewhere WLS APIs are causing this issue.
</font></b>
<b><font color=red>
Or better if u can post your thread in Jdbc Experts Forum: http://forums.oracle.com/forums/forum.jspa?forumID=579 there u may get the Best and Accurate Pointers very soon.
</font></b>
Thanks
Jay SenSharma
http://weblogic-wonders.com (WebLogic Wonders Are Here)