Oracle JDBC, SQLException, COMMIT is not allowed in a subordinate session

My configuration:

1. IBM Websphere 5.0.2
2. database: Oracle9i release 2
3. Oracle JDBC DataSource, with XA enabled
4. driver class: oracle.jdbc.xa.client.OracleXADataSource
5. a servlet that uses JTA UserTransaction's

When I execute "DROP TABLE movies", the Oracle JDBC driver throws a SQLException.

The exception message is

   ORA-02089: COMMIT is not allowed in a subordinate session

Oracle's documentation says:

{{

ORA-02089: COMMIT is not allowed in a subordinate session

Cause: COMMIT was issued in a session that is not the two-phase commit global coordinator.

}}

The strange thing is that I my code does not issue a COMMIT

Also, I disabled autocommit by calling

        conn.setAutoCommit(false)

Here is the stack trace:

[7/19/03 12:10:02:936 PDT] 587e316 SystemErr R strMsg = java.sql.SQLException: ORA-02089: COMMIT is not allowed in a subordinate session

at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)

at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289)

at oracle.jdbc.ttc7.Oall7.receive(Oall7.java:579)

at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1894)

at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1094)

at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2132)

at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2015)

at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2877)

at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:925)

at com.ibm.ws.rsadapter.jdbc.WSJdbcStatement.execute(WSJdbcStatement.java:299)

at foobar.movie.MovieUtil.setupMovieTable(MovieUtil.java:66) Received on Sat Jul 19 2003 - 21:24:53 CEST