Re: Memory leak ?

On 06/04/11 13:11, Pierre Le Mouëllic wrote:
> With this code :
>
> public class TestJDBC {
>
>      private static Timer timer;
>
>      private static Connection connDB;
>      private static PreparedStatement sQLStatement;
>
>      public static void main(String[] args) throws SQLException, ClassNotFoundException {
>
>          connexion("jdbc:postgresql://praslin.qual.dc1:5432/G01DPM","postgres8","password");
>
>          timer = new Timer();
>          timer.schedule(new local_task(), 1000L, 1000);
>      }
>
>      static class local_task extends TimerTask {
>
>          public void run() {
>              ResultSet rs=null;
>              try {
>                  sQLStatement.setInt(1, 2602);
>                  rs = sQLStatement.executeQuery();

Missing
rs.close();

>                  sQLStatement.setInt(1, 2604);
>                  rs = sQLStatement.executeQuery();

Missing
rs.close();

>                  sQLStatement.setInt(1, 2605);
>                  rs = sQLStatement.executeQuery();
>              } catch (SQLException e) {
>              }
>              finally{
>
>                  try {
>                      if(rs!=null)
>                          rs.close();
>                  } catch (SQLException e) {
>                  }
 >
>                  rollBack();
>              }
>          }
>      }
>
>      public static void connexion(String chemin, String user, String password) throws SQLException,
ClassNotFoundException
>      {
>          Class.forName("org.postgresql.Driver");
>          String url = chemin+"?user="+user+"&password="+password;
>
>          //    Connexion
>          connDB = DriverManager.getConnection(url);
>          connDB.setAutoCommit(false);
>          initPreparedStatement();
>      }
>
>      private static void initPreparedStatement() throws SQLException
>      {
>          sQLStatement = connDB.prepareStatement("select f_transite(?,'FPL','225',9,'test','','')");
>      }
>
>      public static void rollBack()
>      {
 >
>          try
>          {
>              connDB.rollback();
>          }
>          catch(SQLException ex)
>          {
>          }
>      }
> }
>
> In eclipse Helios profiler, Jdbc3ResultSet live instances increase (and never decrease). Same thing with
> org.postgresql.core.v3.QueryExecutorImpl$ErrorTrackingResultHandler and org.postgresql.core.v3.QueryExecutorImpl$1
classes.
>
> f_transite stored procedure make some select, insert and update. If you need more explanation, i can give it to you.
>
> Java 6
> postgresql-9.0-801.jdbc3.jar
> PostgreSQL 8.2.5 on powerpc-apple-darwin8.8.0, compiled by GCC powerpc-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1 (Apple
Computer,Inc. build 5363) 
>
> Is it a memory leak ? Or my java code is wrong ?
>
> *Pierre LE MOUËLLIC
> *
> _pierre.lemouellic@xgs-france.com_ <mailto:pierre.lemouellic@xgs-france.com>
> __ <mailto:pierre.lemouellic@xgs-france.com>