DO NOT REPLY [Bug 9416] New: - Memory usage by Tomcat

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=9416

Memory usage by Tomcat

           Summary: Memory usage by Tomcat
           Product: Tomcat 3
           Version: 3.2.3 Final
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Critical
          Priority: Other
         Component: Jasper
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: netcomindia@vsnl.com


We are using Tomcat 3.2.3 on Windows 2000/IIS 5 and we have a problem in that. 
The memory allocated to Tomcat.exe is not getting released. Even many hours 
after the usage has been stopped, the memory used is not coming down. 
Depending on the load, Tomcat reports Out of Memory error in a few hours or 
days and the process occupies all available memory. The only option is to 
restart the server. We had the same problem in Tomcat 4.03 also. And we have 
tried Tomcat with Apache also. This problem has already been reported by few 
other people in Tomcat3 bug database and has been resolved as fixed. What is 
the possible cause of this problem? Is it a Tomcat bug?

We tried the following test program. After the memory allocated to Tomcat 
reaches 64 MB (Maximum set), Tomcat reports Out of memeory - can't create new 
thread error. But other normal JSP pages run without any problem. When we 
monitor the heap memory, 99 to 100% remains used even after hours of 
inactivity. The only option is to restart Tomcat. Can any one tell whether 
anything is wrong with our test program?

<%
for(int j=0;j<1000;j++)
{
   out.println("<hr>"+j);
   for(int i=0;i<10000;i++)
   {
      out.println(i);
      String s1=""+i;
      Thread t = null;
      t = new Thread(s1);
      t = null;
      s1 = null;
   }
   //System.gc();
}
%>

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