#1947 Memory Leak Probably javascript.ScriptalbeObjectSlot or MemberBox

[Mert Serimer]

Hello, first of all thanks to nice library. It is really helpful. But i am using jprofiler to analyze my app's memory management. Below you can see my webClient Options. I am using executorScheduledService and for every thread i am creating new Webclient because re-using same global webclient is a memory hog. Even with reinitiating it still uses memory a lot. The website i am logging and getting some information is bss.bimser.com.tr which is a small-moderate website. Some sample codes below;

WebClient webClient = new WebClient();
        webClient.getOptions().setCssEnabled(false);
        webClient.getOptions().setJavaScriptEnabled(false);
        webClient.getOptions().setAppletEnabled(false);
        webClient.getOptions().setDownloadImages(false);
        webClient.getOptions().setRedirectEnabled(true);
        webClient.getOptions().setUseInsecureSSL(true);
        webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
        webClient.getOptions().setThrowExceptionOnScriptError(false);
        webClient.getOptions().setHistorySizeLimit(0);
        //webClient.getOptions().setMaxInMemory(10);
        //webClient.setAjaxController(new NicelyResynchronizingAjaxController());
        webClient.getCookieManager().setCookiesEnabled(true);
        webClient.waitForBackgroundJavaScript(1500);
        webClient.setJavaScriptTimeout(1501);

        if(loginCookies != null) {
            webClient.setCookieManager(loginCookies);
        }

Some usage
WebClient webClient = initWebClient();

    try {
    WebRequest webRequestPost = new WebRequest(new URL(DefaultValues.unassignedPostAddress), HttpMethod.POST);
    webClient.getPage(webRequestPost);

    WebRequest webRequestGet = new WebRequest(new URL(DefaultValues.unassignedGetAddress), HttpMethod.GET);
    HtmlPage page = webClient.getPage(webRequestGet);

    if (!page.asText().contains(DefaultValues.sessionOutKeyword) && page.asText().length() > 2) {
        findUnassignedTickets(page);
    }
    else
        needLogin = true;
    }catch (Exception ex){
        needLogin = true;
    }

    unassignedTickets.clear();

    try {
        List<HtmlTableRow> htrList = page.getByXPath(DefaultValues.ticketListKeyword);
        for (HtmlTableRow row : htrList) {

            int b = 0;
            Ticket ticket = new Ticket();
            for (HtmlTableCell cell : row.getCells()) {
                mapUnassignedTicketFields(b, cell.asText(), ticket);
                b++;
            }
            doUnassignedAfterMath(ticket);

        }
    }catch(IndexOutOfBoundsException ex){
        ex.printStackTrace();
        needLogin = true;
    }

I tried this but no improvement either.

List<WebWindow> windows = webClient.getWebWindows();
        for (WebWindow wd : windows) {
            wd.getJobManager().removeAllJobs();
        }
        webClient.close();

[Mert Serimer]

jprofiler ss attached

[RBRi]

Strage, you have javascript disabled and facing memory problems with javascript objects. If you can provide a simple, complete sample that is reproducible from here i will try to figure out what is going wrong.
If you do not like to post is here you can send it also to me via private mail (have a look at the team page).

[Mert Serimer]

you can see all code in the attach. Thanks

[RBRi]

Had a quick look at your code. There are several places where you create new webClients. I like to suggest to really use the WebClient as an resource and only use it the safe way

    try (final WebClient webClient = new WebClient()) {
    .....
    }