Have you taken a look at your log files? It could be a memory leak in your app as well.
-- David zhang chao wrote: > My Operating System: RedHat 9 > JVM version: j2sdk 1.4.2_09 > Tomcat: tomcat 4.1.31 > Hardware configuration: Dual PIII 1G, 512MB memory > users: about 30 > > I have a web application and have deployed to my tomcat 4.1.31. The > problem is: tomcat will no response after running about 1 week. When i > enter the URL in IE and press enter, there is nothing happen except > the progress-bar of IE is increasing, after about 2 minutes, IE > displayed "Cannot display this page". The tomcat's process in > server(process named "java") has no any exception, the memory usage > and cpu usage is normal. > > I think that maybe tomcat had no idle thread in thread pool to serve > for requests so, it kept waiting for an thread available. If this is > true, my web application must have bugs which exhausted the thread and > resources. But i don't know, in what situation, these threads cannot > be callback by tomcat. My database resultsets, statements and > connections are released(MySQL database, version 3.23.58, used > tomcat's dbcp connection pool), my network sockets instance are closed > and any no-use class instances have been set to null. > > There is another important issue: when tomcat had no response, the > only thing I can do is to restart the tomcat server but, when i > invoked the tomcat's "shutdown.sh" script, I found that the 8080 port > was not listening but the "java" process was still alive. I must use > "kill -9 <the java process's pid>" to kill the process. > my web application is based on struts framework. When a request > arrives, a Action Servlet is invoked then, servlet will invoke my > singleton mode logic class, logical classes will fill lots of entity > classes and return them back to the client. Did these singleton-mode > logical class cause the problem? > > My English is poor and I hope everybody can read me. Any help and > suggestion will be appreciated. Thanks. > > _________________________________________________________________ > 享用世界上最大的电子邮件系统― MSN Hotmail。 http://www.hotmail.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
