Problem JDBC Connection using OCI Driver on Weblogic Portal on Linux

Question

Hi Team,
I want a JDBC connection using OCI Driver in Weblogic Portal 8.1 sp4 on Linux. When I had tested using JDBC connection using Plain Java Code it is working. Also when I create the OCI Connection Weblogic Connection Pool it is working.
But My Requirement is to create the connection using Java Code in Portal Application
But When I create OCI connection in the code it is throwing NO SUITABLE DRIVER Found.
---------- Code in Plain Java Code ------------ Same code is used in Weblogic Portal Application --------------------------------
     public static void main(String[] args) throws Exception{
          Class.forName("oracle.jdbc.driver.OracleDriver");
          DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
          String url="jdbc:oracle:oci8:@TESTDB";
          Properties props = new Properties();
     props.put("user","scott");
     props.put("password","tiger");
          conn=DriverManager.getConnection(url,props);
When I am using the same code in Weblogic Portal and Deployed on Weblogic Portal Server 8.1 SP4 it is throwing following error.
-------------- Exception on Server Log --------------------
java.sql.SQLException: No suitable driver
at java.sql.DriverManager.getConnection(Ljava.lang.String;Ljava.util.Properties;Ljava.lang.ClassLoader;)Ljava.sql.Connection;(Unknown Source)
at java.sql.DriverManager.getConnection(Ljava.lang.String;Ljava.util.Properties;)Ljava.sql.Connection;(Unknown Source)
My Environment is
LINUX
Weblogic 8.1 SP4
Oracle 9i Client on Same Machine
Oracle 10g Server on Different Machine
My Environment Variables on the Linux Server also set properly as following
PATH=/apps/pmaaum/ant/apache-ant-1.6.5/bin:.:/apps/beahomedev/jdk142_05/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/apps/oracle/ora9i/product/9.2.0/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/apps/oracle/ora9i/bin
LD_LIBRARY_PATH=/usr/lib:/apps/oracle/ora9i/product/9.2.0/lib:/apps/oracle/ora9i/product/9.2.0/lib32:/apps/oracle/ora9i/product/9.2.0/rdbms/lib:/usr/openwin/lib:/apps/oracle/ora9i/product/9.2.0/jdbc/lib
JAVA_HOME=/apps/beahomedev/jdk142_05
JDBC_LIB=/apps/oracle/ora9i/product/9.2.0/jdbc/lib
CLASSPATH=:.:/apps/beahomedev/jdk142_05/lib/rt.jar:/apps/oracle/ora9i/product/9.2.0/jdbc/lib/classes12.jar
Please help me, Let me know if you required anything.
Thanks in Advance
Vishnu
Edited by: vishnuk on Oct 23, 2009 4:07 AM
Edited by: vishnuk on Oct 23, 2009 4:10 AM

Answer 1

Hi Vishnu
Looks like a classloader issue. BEA class loader is very tricky. Any jar added manually in classpath, will end up loading only those classes. Any imports that we have in any of those classes do not get loaded. Anyhow, coming to your point, add classes12.jar inside your portal web project Web-Inf/lib folder and see if that helps. Usually thats where we put all the JARs for 8.1 SPxx applications. If this still breaks, then remove the jar from web-inf/lib folder and add under your portal app App-Inf/lib folder. First try with app-inf/lib folder having this jar. If not then with web-inf/lib. Basically web-inf is specific to that web app only. If you have a different app having this jdbc code, then put under app-inf/lib folder. Make sure that you remove the classes12.jar that you added in classpath either in env variable or in setdomainenv.cmd file.
When weblogic uses native OCI Drivers, it refers to jars at this location: ....\beawlp814\weblogic81\server\ext\jdbc\oracle\10g or 9g. Try using one of these jars and see if that works. Most of the times I used these jars only for oracle specific native drivers.
Word of caution. Try to use Connection Pool and a DataSource created in weblogic console for your jdbc code. This Datasource can still use the Oracle drivers that you want (instead of BEA Weblogic wrapper oci drivers) located in above location. Use JNDI Lookup and get Datasource and then connection. This is more recommended approach with many advantages then using DriverManager approach..
Goud