Could not Deserialize the session data


Recently there was an issue with the session not getting invalidated upon logging out in adf page. we were using the following code to invalidate the session in the logout method


FacesContext fc = FacesContext.getCurrentInstance();
ExternalContext ec = fc.getExternalContext();
HttpServletRequest req = (HttpServletRequest) ec.getRequest();
HttpServletResponse res = (HttpServletResponse) ec.getResponse();
HttpSession ses = (HttpSession) req.getSession(false);
ses.invalidate();
res.sendRedirect(target);
fc.responseComplete();

with the above code the following exception was thrown to the user


java.lang.NullPointerException
 at oracle.adf.share.http.HttpUtil.getAttribute(HttpUtil.java:98)
 at oracle.adf.share.http.HttpSessionScopeAdapter.get(HttpSessionScopeAdapter.java:240)
 at oracle.jbo.common.ampool.SessionCookieImpl.<init>(SessionCookieImpl.java:164)
 at oracle.jbo.http.HttpSessionCookieImpl.<init>(HttpSessionCookieImpl.java:133)
 at oracle.jbo.http.HttpSessionCookieImpl.<init>(HttpSessionCookieImpl.java:124)
 at oracle.jbo.http.HttpSessionCookieFactory.createSessionCookie(HttpSessionCookieFactory.java:131)
 at oracle.jbo.common.ampool.ApplicationPoolImpl.createSessionCookie(ApplicationPoolImpl.java:452)
 at oracle.adf.model.bc4j.DataControlFactoryImpl.findOrCreateSessionCookie(DataControlFactoryImpl.java:141)
 at oracle.adf.model.bc4j.DataControlFactoryImpl.createSession(DataControlFactoryImpl.java:222)
 at oracle.adf.model.binding.DCDataControlReference.getDataControl(DCDataControlReference.java:76)
 at oracle.adf.model.BindingContext.get(BindingContext.java:457)
 at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:280)
 at oracle.adf.model.binding.DCUtil.findSpelObject(DCUtil.java:248)
 at oracle.adf.model.binding.DCUtil.findContextObject(DCUtil.java:383)
 at oracle.adf.model.binding.DCIteratorBinding.<init>(DCIteratorBinding.java:127)
 at oracle.jbo.uicli.binding.JUIteratorBinding.<init>(JUIteratorBinding.java:60)

the issue is solved using the solution given in this forum
https://cn.forums.oracle.com/forums/thread.jspa?threadID=663589

ie. we have to release the Datacontrol also to invalidate the session

...
ValueBinding vb = fc.getCurrentInstance().getApplication().createValueBinding("#{data}");
BindingContext bc = (BindingContext)vb.getValue(fc.getCurrentInstance());
DataControl dc = bc.findDataControl("DataControl");
dc.release(DataControl.REL_ALL_REFS);
..
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2 thoughts on “Could not Deserialize the session data

  1. shanthi

    i too have a similar scenario
    My code is:
    public String doLogout() {
    FacesContext ctx = FacesContext.getCurrentInstance();
    ExternalContext eCtx = ctx.getExternalContext();
    String url = eCtx.getRequestContextPath() + “/logoutservlet”;
    try {
    eCtx.redirect(url);
    } catch (Exception e) {
    e.printStackTrace();
    }
    ctx.responseComplete();

    return “”;

    }

    Where should i release the Datacontrol also to invalidate the session?Kindly reply

    Reply

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