No add, no remove. More interesting fresh result. As I said it happens sometimes, not always. Sometimes when I send two concurrent requests (from 2 *diferent* browser sessions!) there is no errors at all but the result jsp data sheet is summarised! E.g. I get doubled amount of elements in the list on both pages - 304 instead of 152 in normal situation. It seems obviously that somewhere session objects of two different users are overlapped. How do you like it?
----- Original Message ----- From: "Guillermo Meyer" <[EMAIL PROTECTED]> To: "'Struts Users Mailing List'" <[EMAIL PROTECTED]> Sent: Tuesday, March 02, 2004 9:14 PM Subject: RE: ConcurrentModificationException | | If the collection you are iterating is not synchronized, you can get | this error if you remove or add elements. Try using java.util.Vector as | your collection implementation. | | -----Original Message----- | From: [EMAIL PROTECTED] | [mailto:[EMAIL PROTECTED] | Sent: Martes, 02 de Marzo de 2004 03:12 p.m. | To: [EMAIL PROTECTED] | Subject: RE: ConcurrentModificationException | | | genarally you get this error with lists if you are iterating over list | and remove element/add element to list.. | | -----Original Message----- | From: Sergei P. Volin [mailto:[EMAIL PROTECTED] | Sent: Tuesday, March 02, 2004 7:08 PM | To: Struts Users Mailing List | Subject: Re: ConcurrentModificationException | | | | The exception arised by doAfterBody method of IterateTag class, namely | at </logic:iterate>. It means that at least one time the body of | iteration was done. I can guarantee that inside itereator tags - | <logic:iterate>...</logic:iterate> I do not change nor iterator either | session attributes - just reading of session beans. So if smth of that | changes is that only due to some kind of requests interaction. I don't | know how it could be. This is really painful to me since I can't even | think what could it be and the issue persists from time to time. And | again - the application works smoothly when there is no collision of | requests. | | ----- Original Message ----- | From: "Brad Balmer" <[EMAIL PROTECTED]> | To: "Struts Users Mailing List" <[EMAIL PROTECTED]> | Sent: Tuesday, March 02, 2004 8:49 PM | Subject: Re: ConcurrentModificationException | | | | | | Any chance that you were iterating through your HttpSession removing | | attributes? | | | | Sergei P. Volin wrote: | | | | >Greetings! | | > | | >Why did I get this message when sending two concurent requests to the | same page? | | >I'm using: | | >1) RH8.0, Linux 2.4.18 #2 SMP | | >2) java version "1.4.0" | | >Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0) | | >Classic VM (build 1.4.0, J2RE 1.4.0 IBM build cxia32140-20020917a | | >(JIT | enabled: jitc)) | | >3) Tomcat 5.0.19 | | >4) Struts 1.1 | | > | | >The same exception I've got on 4.1.24. I really have problems (with | | >other | symptoms) with concurrent requests. Not often (because server is not | highly | exploited) but persisted. And more often on Linux platform than on | Windows. Why so? Could it be a jvm issue? Or may be Tomcat? Or Struts? | Or mine? Without concurrent requests application works smoothly. | | > | | >Regards, | | > | | >Sergei Volin. | | > | | >HTTP Status 500 - | | > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
