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From "Martin Gainty" <>
Subject Re: Help, Tomcat 4.1.31 no response
Date Sat, 17 Dec 2005 16:40:56 GMT
I Agree with David-
Send us your most recent log from $CATALINA_HOME/logs
----- Original Message ----- 
From: "David Smith" <>
To: "Tomcat Users List" <>
Sent: Saturday, December 17, 2005 11:03 AM
Subject: Re: Help, Tomcat 4.1.31 no response

> 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 "" 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.
>> _________________________________________________________________
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