I know it shouldn't have this problem. It is not the same session, nor the same user that performs the search. Of course each user has the same session, but let me explain some more of what I have seen happening.
The first user (say with session id #s1) obtains the action instance ( say instance #1) from the ActionServlet (RequestProcessr). The action execute(..) starts executing, and makes the query into the database. At this time the second request comes to the ActionServlet (say with session id #s2), of course it has another session created for it, obtains the same action instance as the the first user (#1), and because the query in the database is not finished, the second user sets its session into the action (#s2), so when the first query is finished I call request.getSession() it returns the second users session (#s2) for both users, for the first that made the call and also for the second. Now I have tried to make the execute () method synchronized but it did not have any effect. -----Original Message----- From: Andrew Hill [mailto:andrew.david.hill@;gridnode.com] Sent: Monday, October 28, 2002 10:33 AM To: Struts Users Mailing List Subject: RE: Huge action instance synchronization problem The action instance itself doesnt have any member variables does it? If you store stuff in the HTTPSession each user will have their own session context - it shouldnt (be possible to) get mixed up like that (unless both requests are actually by the same user (in the same session) - in which case you may have troubles like those you describe). -----Original Message----- From: Dan Bunea [mailto:danbunea@;linksystems.ro] Sent: Monday, October 28, 2002 16:14 To: [EMAIL PROTECTED] Cc: 'Craig R. McClanahan' Subject: Huge action instance synchronization problem My problem: I have a search action. When 2 (or more) users submit the search form simultaniously, because the seach usually takes about 1-2 seconds, the same action instance is rethrieved to complete the search and sessions are combined like this: the action makes the search for the first session but does not finish until the second search is performed and because the resultset is divided into pages and this divisation is stored into session, both pages with results are put in the second session, and the second user shall be dispalyed the correct results but the first shall have null pointer exception because in his session there is no object representing the divisation of the resultset on pages. The problem in my opinion is because the same action instance performs the same task for the 2 users and so the sessions are combined, which is a huge problem, because like this every method of an action (dispatch action) that takes a while to complete shall have the same problem. Please advise me how to solve this problem. Thank you , Dan Bunea PS Dear Craig , I am sorry to bother you but this problem is very urgent, as the project is in final stages and this is a potentially huge problem. I have read that each action is instantiated only once in the RequestProcessor and for each request the action is rethrieved and its methods executed, but I have also read that this is not synchronized. -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org> -- To unsubscribe, e-mail: <mailto:struts-user-unsubscribe@;jakarta.apache.org> For additional commands, e-mail: <mailto:struts-user-help@;jakarta.apache.org>
