[Opensource] get java.util.ConcurrentModificationException

[Ricard Olle]

----- Original Message -----
From: "D Lloyd" <orbacle at yahoo.com>
To: <opensource at jcorporate.com>
Sent: Monday, November 04, 2002 1:52 PM
Subject: Re: [Opensource] get java.util.ConcurrentModificationException


> If I recall correctly, this issue was addressed in this list some time
> back.  If so, it was fixed during the previous bug cycle.  Try upgrading
> to the latest stable version, 5.0.
>
> Thanks
> David Lloyd
>
>
> --- Philipp Reber <philipp.reber at triadem.ch> wrote:
> > Hi there,
> >
> > At the moment I'm working with expresso 4.02 and I'm having some
> > problems:
> >
> > I have a TimestampDBObj which contains the workingtime of users. To
> > output
> > this values in a table, I
> > request the database with retrieving multiple records by each day and
> > project. All received users in the List
> > I put out in the tabe, each one in a new row.
> >
> > The problem is: Retrieving multiple records from the DB (for loop) I get
> >
> > sometimes a an
> > Exception 2  java.util.ConcurrentModificationException. I did several
> > tests
> > but the Exeptions
> > occueres not regular. It just happens by coincidence. I checked the
> > setFields(), they are always correct.
> > The mistake must be somewhere in the response of the DB. Unfortunately I
> >
> > have now idea any more at
> > the moment.
> >
> > Does anybody have or had similar Exceptions problems or is it just me
> > how
> > is doing some garbage??
> >
> > I would be very happy to get some response.
> > Thanks in advanced!
> >
> > Greetings, Philipp
> >
> >
> > Some of my code:
> >
> >
> >
>
/***************************************************************************
*****
> >          * Create blocks
> >
> >
>
****************************************************************************
****/
> >          // create a list block
> >
> >          Block blockList = new Block("ProjecttimeList");
> >          myResponse.add( blockList );
> >          blockList.setAttribute("table", "Y");
> >
> >          String head = " Day | Date | User | Activity | Time ";
> >          blockList.setAttribute("header-row",head);
> >
> >          try{
> >              // create a block for each row
> >              Block blockRow = new Block("row");
> >              blockRow.setAttribute("row", "Y");
> >
> >              // select each day of month
> >              for (int p = 1; p <= 31; p++){
> >                if (p < 10){
> >                  selecteddate = selectedYear + selectedMonth + "0" + p;
> >                  }
> >                else{
> >                  selecteddate = selectedYear + selectedMonth + p;
> >                  }
> >
> >                  try{
> >                    TimestampDBObj timestampsList = new TimestampDBObj();
> >                    TimestampDBObj oneTimestamp = null;
> >                    timestampsList.setField("ts_project",
> > selectedProject);
> >                    timestampsList.setField("ts_date", selecteddate);
> >
> >                    // retrieve records of specific date
> >                    for (Iterator e =
> > timestampsList.searchAndRetrieveList("ts_date").iterator();
> > e.hasNext();){
> >
> >                      oneTimestamp = (TimestampDBObj) e.next();
> >                      out2.println("p in for loop : " + p);
> >
> >                       // get day from date
> >                       Weekday  myweekday = new Weekday();
> >                       String weekday =
> > myweekday.getWeekday(Integer.parseInt(selectedYear),
> > Integer.parseInt(selectedMonth)-1, p);
> >
> >                       blockRow.add(new Output(weekday));
> >                       blockRow.add(new
> > Output(oneTimestamp.getField("ts_date")));
> >                       blockRow.add(new
> > Output(oneTimestamp.getField("ts_user")));
> >                       blockRow.add(new
> > Output(oneTimestamp.getField("ts_activity")));
> >
> >                       oneSpanTime =
> > round(Double.parseDouble(oneTimestamp.getField("ts_span")), 2, 0);
> >                       blockRow.add(new
> > Output(Double.toString(oneSpanTime)));
> >
> >                       blockList.add(blockRow);
> >
> >                  }//end of for (row)
> >
> >                  }
> >                  catch (Exception e){
> >                    System.out.println("Exception 2 ;  " + e.toString());
> >                  }
> >
> >               }//end of for from select each day
> >
> >
> >          }//end of try (create each block for row)
> >          catch (Exception de){
> >          System.out.println("Exception 1 ;  " + de.toString());
> >          }
> >
>
>
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