Hi, I am using Tomcat for just the second time, and I am running into
some trouble.
I am trying to make a fantasy baseball drafting webpage for me and my
friends. The code below is a servlet action class that will execute
properly (and produce the proper jsp) for the first two times it is
called.
However, invariably on the third execution, the memory balloons out of
control (I know this isn't very accurate, but I am looking at my task
manager Mem usage column) it goes from about 30MB when the application
first runs to around 300MB or more, until my whole system crashes when
the code is run for the third time.
I am using Windows 2000, j2sdk1.4.1_01 and Tomcat 4.0.
Here is my code. I browsed the archives and haven't found any examples
for memory leaks that happen this drastically. I hope someone can help,
I would be very appreciative. Here is my code
Thanks,
Shaun Roach
public final class DraftAction extends Action {
public ActionForward perform(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
// Extract attributes we will need
Locale locale = getLocale(request);
// Validate the request parameters specified by the user
ActionErrors errors = new ActionErrors();
HttpSession session = request.getSession();
String position = request.getParameter("position");
String ix = request.getParameter("ix");
ArrayList teams = (ArrayList)session.getAttribute("teams");
ArrayList positions =
(ArrayList)session.getAttribute("positionLists");
Team draftingTeam = (Team)teams.get(0);
PositionList positionList;
PositionList teamPositionList;
if( "C".equals(position) ) {
positionList = (PositionList)positions.get(0);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(0);
}
else if( "1B".equals(position) ) {
positionList = (PositionList)positions.get(1);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(1);
}
else if( "2B".equals(position) ) {
positionList = (PositionList)positions.get(2);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(2);
}
else if( "3B".equals(position) ) {
positionList = (PositionList)positions.get(3);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(3);
}
else if( "SS".equals(position) ) {
positionList = (PositionList)positions.get(4);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(4);
}
else {
positionList = (PositionList)positions.get(5);
teamPositionList =
(PositionList)draftingTeam.getPositions().get(5);
}
int index;
try
{
index = Integer.parseInt(ix);
}
catch(NumberFormatException nfe)
{
index = 0;
}
if( index >= positionList.getPlayers().size() )
index = 0;
Player player = (Player)positionList.getPlayers().get(index);
positionList.getPlayers().remove(index);
teamPositionList.getPlayers().add(player);
// Report any errors we have discovered back to the original
form
if (!errors.empty()) {
saveErrors(request, errors);
return (new ActionForward(mapping.getInput()));
}
session.setAttribute("positionLists",positions);
session.setAttribute("teams", teams);
/*
*/
// Forward control to the specified success URI
// Remove the obsolete form bean
if (mapping.getAttribute() != null) {
if ("request".equals(mapping.getScope()))
request.removeAttribute(mapping.getAttribute());
else
session.removeAttribute(mapping.getAttribute());
}
return (mapping.findForward("draftpage"));
}
}
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