[Opensource] get java.util.ConcurrentModificationException

[D Lloyd]

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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