Webdynpro Application hangs on executing query

Question

I am  having strange issue with Webdynpro application running JDBC code. Webdynpro application hangs intermittently when it tries to run the below jdbc code .
This code is written on custom controller. We are using the SAPSR3DB datasource.  Do anybody  have any idea why this is happening . Thanks in advance
wdThis.wdGetAPI().getComponent().getMessageManager();
                                try {
                                                Connection conn;
                                                InitialContext ctx = new InitialContext();
                                                DataSource dataSource = (DataSource) ctx.lookup(readPropertyFile());
                                                conn = dataSource.getConnection();
                                                PreparedStatement stmt =
                                conn.prepareStatement(
                                                                                "insert into ZAE_PROD_GRtable(AUFNR,EXIDV_P,EXIDV_C,MATNR,WERKS,CHARG,VEMNG,VEMEH,CWMVEMNG,CWMVEMEH,STATUS,INDC) values(?,?,?,?,?,?,?,?,?,?,?,?)");
                                                stmt.setString(1, wdContext.currentContextElement().getAUFNR());
                                                stmt.setString(2, wdContext.currentHUDataElement().getEXIDVP());
                                                stmt.setString(3, wdContext.currentHUDataElement().getEXIDVC());
                                                stmt.setString(4, wdContext.currentOrderDataElement().getMATNR());
                                                stmt.setString(5, wdContext.currentOrderDataElement().getWERKS());
                                                stmt.setString(6, wdContext.currentOrderDataElement().getBATCH());
                                                stmt.setString(7, wdContext.currentHUDataElement().getVEMNGP());
                                                stmt.setString(8, wdContext.currentHUDataElement().getVEMEHP());
                                                stmt.setString(9, wdContext.currentHUDataElement().getVEMNGC());
                                                stmt.setString(10, wdContext.currentHUDataElement().getVEMEHC());
                                                stmt.setString(11, "1");
                                                stmt.setString(12, wdContext.currentContextElement().getHuIndicator));
                                                stmt.executeUpdate();
                                                stmt.close();
                                                conn.close();
                                } catch (SQLException ex) {
                                                msgMgr.reportException(ex.getLocalizedMessage() +";SQL State - " + ex.getSQLState(), true);
                                } catch (Exception ex) {
                                                msgMgr.reportException(ex.getLocalizedMessage(), true);
finally {
               try {
                    conn.close();
               } catch (Exception e) {
                    msgMgr.reportException(e.getLocalizedMessage(),true);

Answer 1

Hello,
There can be any issue, i dont see any compile time issue with your code, but you may wana do a simplistic query first.
First of all, the statement and conection close, do it in the finally block, untill unless you are reusing it.
other than this.
First, after connection, see if you are getting the connection or not.
conn = dataSource.getConnection();
//print the connection and check if the connection is fine.
comment remaining stuff in the loop.
In the second shot, run a simple query like select count(*) from TABLE ;
to see if the connection and execution is fine. this will make sure
Also, before you set the values into the statement using setString, print the values to check for correctness and not null.
btw, i found an extra ")" in your setString(12,.....) ;
stmt.setString(12, wdContext.currentContextElement().getHuIndicator));
What are you trying to close in your finally block when you have already closed the connection in the try.
try{
          stmt.close();
          conn.close();
     } catch (SQLException ex) {
          msgMgr.reportException(
               ex.getLocalizedMessage() + ";SQL State - " + ex.getSQLState(),
               true);
     } catch (Exception ex) {
          msgMgr.reportException(ex.getLocalizedMessage(), true);
     finally {
          try {
               conn.close();
          } catch (Exception e) {
               msgMgr.reportException(e.getLocalizedMessage(), true);
Remove it from try.
Regards,
Nitin
Edited by: Nitin Mahajan on Jun 16, 2009 6:20 PM
Edited by: Nitin Mahajan on Jun 16, 2009 6:21 PM
Edited by: Nitin Mahajan on Jun 16, 2009 6:22 PM