My problem in using weblogic Datasource and proxy user

Question

Hello
I create a DataSource in Weblogic that connect to the database by a proxy user and I have a client application that use this DataSource and create a proxy session , I've written my client application (it's a stand alone client application) code below :
public static void main(String [] args) {
OracleConnection conn=null;
javax.sql.DataSource ds=null;
Hashtable env = new Hashtable();
env.put( Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory" );
env.put(Context.PROVIDER_URL, "t3://127.0.0.1:7001");
try{
Context context=new InitialContext( env );
ds=(javax.sql.DataSource) context.lookup ("OracleConnection2");
conn=(OracleConnection) ds.getConnection();
java.util.Properties prop = new java.util.Properties();
prop.put(OracleConnection.PROXY_USER_NAME, "web_user1");
prop.put(OracleConnection.PROXY_USER_PASSWORD,"web_user1");
conn.openProxySession(OracleConnection.PROXYTYPE_USER_NAME, prop);
if (conn.isClosed()){
System.out.println("Connection closed");
return;
testJDBC(conn,true);
for(int k=0;k<10;k++){
testJDBC(conn,false);
conn.close(OracleConnection.PROXY_SESSION);
conn.close();
}catch(Exception ex){
ex.printStackTrace();
It works but my problem is that in line "prop.put(OracleConnection.PROXY_USER_PASSWORD,"web_user1")" or line "prop.put(OracleConnection.PROXY_USER_NAME, "web_user1");"
Let me to mention a scenario :
*1- I type a wrong username or password in my client application and I run the client application it shows me this error : invalid username/password*
*this error is acceptable*
*2- then I correct the wrong username or password immediately and run the application again , it shows me this error (at line conn.openProxySession(OracleConnection.PROXYTYPE_USER_NAME, prop)) :*
java.sql.SQLException: Closed Connection
     at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:234)
     at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:223)
     at weblogic.jdbc.rmi.internal.ConnectionImpl_weblogic_jdbc_wrapper_JTAConnection_weblogic_jdbc_wrapper_XAConnection_oracle_jdbc_driver_LogicalConnection_1032_WLStub.openProxySession(Unknown Source)
     at weblogic.jdbc.rmi.SerialConnection_weblogic_jdbc_rmi_internal_ConnectionImpl_weblogic_jdbc_wrapper_JTAConnection_weblogic_jdbc_wrapper_XAConnection_oracle_jdbc_driver_LogicalConnection_1032_WLStub.openProxySession(Unknown Source)
     at oracle.HRFacadeClient.main(HRFacadeClient.java:38)
*3- I run the application again (by correct username and password) but this time it shows me this error :*
java.sql.SQLException: Unsupported feature
     at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:234)
     at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:223)
     at weblogic.jdbc.rmi.internal.ConnectionImpl_weblogic_jdbc_wrapper_JTAConnection_weblogic_jdbc_wrapper_XAConnection_oracle_jdbc_driver_LogicalConnection_1032_WLStub.openProxySession(Unknown Source)
     at weblogic.jdbc.rmi.SerialConnection_weblogic_jdbc_rmi_internal_ConnectionImpl_weblogic_jdbc_wrapper_JTAConnection_weblogic_jdbc_wrapper_XAConnection_oracle_jdbc_driver_LogicalConnection_1032_WLStub.openProxySession(Unknown Source)
     at oracle.HRFacadeClient.main(HRFacadeClient.java:38)
*4 - if I repeat running the application for multi times every time it shows me the previous error*
*5- I wait about one minute the problem solved and my application can create proxy session *
the result is that if I wanna create proxy session by wrong username or password and I get "Invalid username/password" error message , then after correcting username or password I have to wait about one minute and then run the application again_
Do you know how I can overcome this problem ?
Thank you

Answer 1

Hi Jamshid,
There is same problem observed few days back with us, and we have used the below code, and it got solved. Actually there is a problem observed while using proxy connections on weblogic.
if(conn instanceof weblogic.jdbc.extensions.WLConnection){
     weblogic.jdbc.extensions.WLConnection cn=(weblogic.jdbc.extensions.WLConnection)conn;
     cn.clearStatementCache();
http://rocksolutions.wordpress.com/2010/06/04/connection-pool-issue-on-weblogic/
Hope this helps.
Thanks