Cannot enable auto commit within JTS using websphere

Question

i suddenly encountered some exceptions like this yet the process seems to be ok. i am pretty new to websphere, help please:
java.lang.IllegalStateException: Cannot enable auto commit within JTS transaction
     at com.ibm.ejs.cm.pool.ConnectO.setAutoCommit(ConnectO.java:2085)
     at com.ibm.ejs.cm.proxy.ConnectionProxy.setAutoCommit(ConnectionProxy.java:594)

Answer 1

I'm setting autoCommit to false in some of my code and it works. Here is the example:
//This code works for the Oracle Thin Driver
               conn.setAutoCommit(false); // <- required!
             // initialize LOB reference
             GDate curDate = new GDate();
             ps = conn.prepareStatement("insert into Calculated_Rate_Import values (empty_clob(), ?)");
             //conn.createStatement().executeUpdate("insert into Calculated_Rate_Import values (empty_clob(), TO_DATE('" + GDate.getSafeSqlDate(curDate) + "'))");
             ps.setTimestamp(1, GDate.getSafeTimestamp(curDate));
             ps.executeUpdate();
             ps = conn.prepareStatement("select Calculated_Rate_Import from Calculated_Rate_Import where Import_Date = ? for update");
             ps.setTimestamp(1, GDate.getSafeTimestamp(curDate));
               results = ps.executeQuery();
             results.next();
             // get lob reference from write lock
                 //oracle.sql.CLOB clob = ((oracle.jdbc.driver.OracleResultSet)results).getCLOB(1);
               oracle.sql.CLOB clob = (oracle.sql.CLOB)results.getClob("Calculated_Rate_Import");
             // create statement for update
             ps = conn.prepareStatement("update Calculated_Rate_Import set Calculated_Rate_Import = ? where Import_Date = ?");
             // stream data into lob
             java.io.OutputStream os = ((oracle.sql.CLOB)clob).getAsciiOutputStream();
             try{
                  os.write(fileContents.getBytes());
                       os.close();
             }catch(IOException e){
                  e.printStackTrace();
             // execute update
             //((oracle.jdbc.driver.OraclePreparedStatement)ps3).setCLOB(1, clob);
             ps.setClob(1, clob);
             ps.setTimestamp(2, GDate.getSafeTimestamp(curDate));
             ps.executeUpdate();
             // close lock
             results.close();
             conn.commit();
             //finished inserting CLOB
             //set the auto commit back to true, required!
               conn.setAutoCommit(true);