Hi, I'm using the following:
JDK1.5 Tomcat 6 SQL Server 2000 Server running on Windows 2000 The web app deployed consists of: an application form filled in by the prospective student, a servlet that gets the form parameters (>60), processes them, and saves the data input by the user to several tables in the database. Processing of the form data involves applying testing the data against admission criteria. When the web ap was first deployed some months ago, we had the problem that some of the input by the users was too large for the space allocated in the corresponding column in the db table - this caused SQLExceptions to be thrown each time this happened. At the same time we noticed that many times a day the CPU load on the server machine was up at 60% - 90+% - Tomcat was responsible for this CPU load almost exclusively - the other processes running on the machine were taking <3%. This meant having to restart Tomcat several times a day. At first we thought this was related to the db insertion problem. We fixed the db issue so that no more exceptions are thrown, but we still find the CPU load up at >60% at least once a day - Tomcat responsible again. Another thing I noticed in testing the app was that if after I submitted an application I hit the 'Back' button on the browser and then submitted again, app would hang, and the CPU load on the server machine would rise to >60%. I tried this several times, with the same result each time. However, it was possible to submit an aplication from a different browser even when the CPU load was high. Oddly, when I did this test on my local machine I didn't have this problem. I hope I've laid out the situation clearly. My searches on the web for this sort of problem have yielded no solution. If anybody has had this problem and fixed it, or has an insight into what the problem might be, I'd greatly appreciate hearing about it! Many thanks! bob
