Java Database Connections couldn't be closed on PI 7.1 EHP1

Question

Hi,  I develop a dynamic web project to PI. And I use Database conection in that web project. Even  I closed the connection in java , Connection doesn't closed and after a while PI pooling size reach the maximum size and PI doesn't response.  I find open connections on MSSQL and connections' status are sleeping, cmd fields are AWAITING COMMAND.  I have to restart  PI these to close that connections.
I get Connections like these code
                        InitialContext cxt = new InitialContext();
               final DataSourceManager dsm = (DataSourceManager) cxt
                         .lookup("dbpool");
                        String lookUpName = dsm.getSystemDataSourceDescriptor().getDataSourceName();
               DataSource ds = (DataSource) cxt.lookup("jdbc/" + lookUpName);
               ds.setLoginTimeout(60);
               conn = ds.getConnection();...
and I close connections like these
                        conn = db.getDefaultDatabaseConnection();
               if (conn != null) {
                    try {
                         conn.setAutoCommit(true);
                         String sql = "INSERT INTO
                         pstmt.close();
                         conn.close();
                    } catch (Exception e) {
                                 } finally {
                         try {
                              pstmt.close();
                              conn.close();
                         } catch (SQLException e2) {
                              e.printStackTrace();
                         e.printStackTrace();
I changed system DataSource's   and i give these parameters
Initial Connections: 5
Maximum Connections: 125
Maximum Time to Wait for Connection: 90
Connection Lifetime (Sec.): 60
Cleanup Interval (Sec.) : 90
it didn't work either
Can anyone hepl me  ?

Answer 1

I would like to make slight changes in code. . Please close the resources only in finally block.
Dont know you are closing resultset or not. If not, you must close it
conn = db.getDefaultDatabaseConnection();
try {
if (conn != null) {
conn.setAutoCommit(true);
String sql = "INSERT INTO
} catch (Exception e) {
} finally {
    try{ 
       if(rs != null){
        rs.close()
     }catch(SqlException se){
        //log it  
   try{
       if(stmt != null){ 
            stmt.close();
     }catch(SqlException se){
        //log it
  try{
   if(conn != null){
     conn.close();
} catch(SQLException ss){
  // log it
} // end of finally
Hope this help.