Hi, Thank you all for the reply!
I am sure that's some of my webapps' problem. It runs ok at beginning. After it runs one day, the CPU usage is very high, I have to restart Tomcat. Of course, I can use JProber to analzye which webapp goes wrong. But I don't want restart Tomcat. I want to find that abnormal webapp and delete it directly. So what I want is a light weight tool, just find out which webapp causes the problem when Tomcat runs abnormally. Is there this kind tool? -- Sincerely, Maggie