Jdbc connection blocks when run from jar

Question

The following code establishes a connection EXCEPT when run from within a jar file:
String jdbcDriverName = "oracle.jdbc.driver.OracleDriver";
String dbConnectionURL = "jdbc:oracle:thin:@192.168.2.7:1521:PRISM";
String userName = "mdo";
String password = "mdpass";
// Load the JDBC driver and create a connection to the database
Class.forName( jdbcDriverName );
OracleDataSource dataSource = new OracleDataSource();
dataSource.setURL( dbConnectionURL );
dataSource.setUser( userName );
dataSource.setPassword( password );
connection = dataSource.getConnection();
When run from a jar file, the application does not execute beyond the line:
connection = dataSource.getConnection();
No exceptions are thrown, it just appears that getConnection never returns.
Do I need to do anything different to execute this code from within a jar file?
Thanks in advance,
Phil
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Answer 1

When building the JAR file, I inadvertently included files from two Oracle JDBC driver versions (1.2 and 1.4). I was building a single jar file with all files in it.
I am guessing same named files existed in both driver JARs and caused "confussion" when combined into the single JAR.
Still, I would have expected an exception to be thrown or a null connection to be returned instead if the thread just blocking.
Thanks for all replies,
Phil
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