Programme stuck and lock error

Question

hi all,
infact such type of request i post in another post, but i think that was not related to its subject. sorry if u ppl think it replica.
i am facing problem in my programme which was stuck randomly, sometime after 12 hours or sometime after 25 hours.
when my programme was stuck send SIGQUIT it returns me following log, can anyone suggest me what could be the reason.
Full thread dump Java HotSpot(TM) Client VM (1.4.2_08-b03 mixed mode):
"Signal Dispatcher" daemon prio=10 tid=0x000cdab0 nid=0x6 waiting on condition [0..0]
"Finalizer" daemon prio=8 tid=0x000c8980 nid=0x4 in Object.wait() [fc77f000..fc77fc30]
at java.lang.Object.wait(Native Method)
- waiting on <0xf1f1efe0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
- locked <0xf1f1efe0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x000c7020 nid=0x3 in Object.wait() [fe27f000..fe27fc30]
at java.lang.Object.wait(Native Method)
- waiting on <0xf1f1f048> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:429)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:115)
- locked <0xf1f1f048> (a java.lang.ref.Reference$Lock)
"main" prio=5 tid=0x00035a98 nid=0x1 runnable [ffbfe000..ffbff1e4]
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at oracle.net.ns.Packet.receive(Unknown Source)
at oracle.net.ns.DataPacket.receive(Unknown Source)
at oracle.net.ns.NetInputStream.getNextPacket(Unknown Source)
at oracle.net.ns.NetInputStream.read(Unknown Source)
at oracle.net.ns.NetInputStream.read(Unknown Source)
at oracle.net.ns.NetInputStream.read(Unknown Source)
at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:978)
at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:950)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:434)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:181)
at oracle.jdbc.driver.T4CPreparedStatement.execute_for_rows(T4CPreparedStatement.java:791)
at oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:912)
at oracle.jdbc.driver.T4CPreparedStatement.execute_maybe_describe(T4CPreparedStatement.java:693)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:988)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2884)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:2925)
- locked <0xf191fe80> (a oracle.jdbc.driver.T4CPreparedStatement)
- locked <0xf1f1f178> (a oracle.jdbc.driver.T4CConnection)
at com.warid.web2sms.Web2SMS.getGameMsg(Web2SMS.java:90)
at com.warid.web2sms.Web2SMS.main(Web2SMS.java:53)
"VM Thread" prio=5 tid=0x000c61d8 nid=0x2 runnable
"VM Periodic Task Thread" prio=10 tid=0x000d0910 nid=0x8 waiting on condition
"Suspend Checker Thread" prio=10 tid=0x000cd1b0 nid=0x5 runnable

Answer 1

hi all,
this is my code
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.sql.PreparedStatement;
import java.sql.Connection ;
import java.sql.SQLException ;
import java.sql.ResultSet;
import java.net.URL;
import java.net.HttpURLConnection;
public class WS
      private Connection        GConn;
      private PreparedStatement GPS;
      public WS()
               gVasDBConnect();
      }//EO constructor
       public static void main(String args[])
           WS  Gd=new WS();
            while(true)
                  try
                      if(Gd.GConn.isClosed() || Gd.GConn==null)
                          Gd.gVasDBConnect();
                      Gd.getGameMsg();
                      Thread.sleep(1000);
                  catch(Exception ex)
                    System.out.print(ex.getMessage());
                    try
                          if(!Gd.GConn.isClosed())
                            Gd.GConn.close();
                      catch(SQLException se)
                        System.out.println(se.getMessage());
            }//EO While
      }//EO main
      public void getGameMsg()
          int total     =0;
          try
                String Qry="SELECT id,to_address,from_address,message FROM tbl_ws_messages WHERE status=0";
                GPS=GConn.prepareStatement(Qry);
                ResultSet rs=GPS.executeQuery();//Programe stuck here
                  while(rs.next())
                     if(rs.getString("message")!=null)
                        sendGameMessage(rs.getInt("id"),rs.getString("to_address"),rs.getString("from_address"),rs.getString("message"));
                      }else{
                        sendGameMessage(rs.getInt("id"),rs.getString("to_address"),rs.getString("from_address"),"");
                  rs.close();
                  GPS.close();
            catch(Exception e)
                System.out.println("getGamemsg "+e.getMessage());
                try
                    if(GConn.isClosed() || GConn==null)
                        gVasDBConnect();
                catch(SQLException se)
                  System.out.println(se.getMessage());
      }//EO get quiz method
       public void sendGameMessage(int uid,String mobile,String sCode,String msg)
            try
                  String postdata = "from="+sCode+"&to="+mobile+"&message="+msg;
                  System.out.println(postdata);
                    try
                      HttpURLConnection HttpURLConn =null;
                       URL url = new URL("http://XX.XX.XX/sms/sendwebmsg.jsp");
                         HttpURLConn = (HttpURLConnection)url.openConnection();
                         HttpURLConn.setDoOutput(true);
                         HttpURLConn.setRequestMethod("POST");
                         OutputStreamWriter wr = new OutputStreamWriter(HttpURLConn.getOutputStream());
                         wr.write(postdata);
                         wr.flush();
                         BufferedReader rd = new BufferedReader(new InputStreamReader(HttpURLConn.getInputStream()));
                         rd.close();
                         wr.close();
                   catch (Exception e)
                      //System.out.println("Error=====from="+from+"&to="+cell+"&message="+msg);
                      System.out.println("in snd message "+e.getMessage());
              String uQry="UPDATE tbl_ws_messages SET status=1,updated=SysDate WHERE id="+uid;
              PreparedStatement up = GConn.prepareStatement(uQry);
              up.executeUpdate();
              up.close();
            catch(SQLException se)
              System.out.println("in sendGMessage"+ se.getMessage() );
        }//EO sendMessage
        public void gVasDBConnect()
                try
                      String jdbc="jdbc:oracle:thin:@XX.XX.XX.XX:1521:orcl";
                      String user="my";
                      String pass="my";
                      java.sql.DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
                      GConn = java.sql.DriverManager.getConnection (jdbc, user, pass);
                      GConn.setAutoCommit (true);
                      System.out.println(new java.util.Date() + " : Connected!!!!!!");
                catch(Exception e)
                  System.out.println("Error in db connect : " + e.toString());
        }//EO
}//EO class