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Hi
We have an application which has a controller servlet. On any action the request is submitted to the controller, the controller meanwhile instantiates a helper class to do the necessary action and on completion forwards it to the result JSP page.
On certain instances we have observed the following:
On click of Submit button a request is given to controller and the processing begins….On completion a JSP page is displayed with different charts. There are instances when there are some huge Database calculations taking place and at that point we get a “Page cannot be displayed” error message. This happens at around 1.5 to 2 minutes. We have a Netscape web server and a Weblogic 5.1 App server and a Oracle 8i database. In the weblogic access logs I see that there have been two calls to the controller and we get a java.util.ConcurrentModificationException…..This is happening in the production environment…Also we tried to put System.outs and we saw that it things were being printed twice…..However, in QA this does not happen whereby we have a similiar environment, however queries run a bit faster due to less load on db server.
Please help me if you can.
Regards
Amit Wadkar
