Hi,
I am new to web application development and have a puzzling question.
I appreciate very much if you can provide some pointers in resolving it.
In the LoginServlet's doPost() method, after the user is authenticated,
I invalidate the current session and create a new session.
Then I do a forward (instead of a redirect) to a JSP using rewritten URL.
session = request.getSession(false);
...
session.invalidate();
session = request.getSession(true);
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(
response.encodeURL(lsURL) );
dispatcher.forward( request, response );
The session ID that's encoded to the URL is the old session ID instead of
the new one.
I tried to remove all session attributes of the current session instead of
creating a new one and got a ConcurrentModificationException.
session = request.getSession(false);
...
Enumeration attrNames = session.getAttributeNames();
String attrName = "";
while (attrNames.hasMoreElements())
{
attrName = (String)attrNames.nextElement();
session.removeAttribute( attrName );
}
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(
response.encodeURL(lsURL) );
dispatcher.forward( request, response );
and got:
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.next(HashMap.java:736)
at org.apache.catalina.util.Enumerator.nextElement(Enumerator.java:166)
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