tomcat 运行一段时间后几乎耗尽系统资源

Question

Tomcat 是含一个很简单的HTTP Server，一般只能Debug 用，不能作为服务器用。请用Apache 或 IIS 作HTTP Server就不会有问题

Answer 1

谢谢关注，以下是servlet程序， 接受请求后，分析参数调用中间件处理，应该没问题吧package jEnableServer.servlet;import java.io.*;
import java.net.Socket;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;public class JESerializeServlet extends HttpServlet
{    public JESerializeServlet()
    {
    }    private void loadParams()
    {
        if(host != null)
            return;
        String s = null;
        for(Enumeration enumeration = getInitParameterNames(); enumeration.hasMoreElements();)
        {
            String s1 = (String)enumeration.nextElement();
            if(s1.equals("jenable.system.servlet.host"))
                host = getInitParameter(s1);
            else
            if(s1.equals("jenable.system.servlet.port"))
                s = getInitParameter(s1);
        }        if(host == null)
        {
            System.out.println("<JESerializeServlet Log>Error occurs while trying to retrieve j/Enable Server host, use default");
            host = "localhost";
        }
        try
        {
            port = Integer.parseInt(s);
        }
        catch(Exception exception)
        {
            System.out.println("<JESerializeServlet Log>" + exception.toString());
            System.out.println("<JESerializeServlet Log>Error occurs while trying to retrieve j/Enable Server port, use default");
            port = 5999;
        }
        System.out.println("<JESerializeServlet Log>j/Enable Server Host: " + host);
        System.out.println("<JESerializeServlet Log>j/Enable Server Port: " + port);
    }    public void doGet(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
        throws IOException, ServletException
    {
        processRequest(httpservletrequest, httpservletresponse, "GET");
    }    public void doPost(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse)
        throws IOException, ServletException
    {
        processRequest(httpservletrequest, httpservletresponse, "POST");
    }    private void processRequest(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, String s)
        throws IOException, ServletException
    {
        loadParams();
        httpservletresponse.setContentType("text/html;charset=GB2312");
        PrintWriter printwriter = httpservletresponse.getWriter();
        try
        {
            Hashtable hashtable = new Hashtable();
            String s1;
            String s3;
            for(Enumeration enumeration = httpservletrequest.getHeaderNames(); enumeration.hasMoreElements(); hashtable.put(s1, s3))
            {
                s1 = (String)enumeration.nextElement();
                s3 = httpservletrequest.getHeader(s1);
            }            hashtable.put("REQUEST_METHOD", s);
            if(s.equals("GET"))
            {
                String s2 = httpservletrequest.getQueryString();
                if(s2 != null)
                {
                    s2 = new String(s2.getBytes("8859_1"), "GB2312");
                    StringTokenizer stringtokenizer = new StringTokenizer(s2, "&");
                    Object obj = null;
                    while(stringtokenizer.hasMoreTokens()) 
                    {
                        String s5 = stringtokenizer.nextToken();
                        StringTokenizer stringtokenizer1 = new StringTokenizer(s5, "=");
                        String s6 = null;
                        s6 = stringtokenizer1.nextToken();
                        if(stringtokenizer1.hasMoreTokens())
                            hashtable.put(s6, stringtokenizer1.nextToken());
                    }
                }
            } else
            if(s.equals("POST"))
            {
                for(Enumeration enumeration1 = httpservletrequest.getParameterNames(); enumeration1.hasMoreElements();)
                {
                    String s4 = (String)enumeration1.nextElement();
                    String as[] = httpservletrequest.getParameterValues(s4);
                    if(as != null)
                    {
                        for(int j = 0; j < as.length; j++)
                            hashtable.put(new String(s4.getBytes("8859_1"), "GB2312"), new String(as[j].getBytes("8859_1"), "GB2312"));                    }
                }            }
            StringBuffer stringbuffer = new StringBuffer();
            Cookie acookie[] = httpservletrequest.getCookies();
            if(acookie != null)
            {
                for(int i = 0; i < acookie.length; i++)
                {
                    stringbuffer.append(acookie[i].getName()).append("=").append(acookie[i].getValue()).append(";");
                    hashtable.put(acookie[i].getName(), acookie[i].getValue());
                }            }
            if(stringbuffer.length() > 0)
                hashtable.put("HTTP_COOKIE", stringbuffer.toString());
            Socket socket = new Socket(host, port);
            ObjectOutputStream objectoutputstream = new ObjectOutputStream(socket.getOutputStream());
            objectoutputstream.writeObject(hashtable);
            objectoutputstream.flush();
            BufferedReader bufferedreader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String s7 = null;
            boolean flag = true;
            while((s7 = bufferedreader.readLine()) != null) 
                if(flag)
                {
                    if(s7.equals(""))
                        flag = false;
                    if(s7.startsWith("Set-Cookie"))
                    {
                        String s8 = s7.substring(12);
                        StringTokenizer stringtokenizer2 = new StringTokenizer(s8, "=;");
                        String s9 = null;
                        if(stringtokenizer2.hasMoreTokens())
                            s9 = stringtokenizer2.nextToken();
                        if(stringtokenizer2.hasMoreTokens())
                            httpservletresponse.addCookie(new Cookie(s9, stringtokenizer2.nextToken()));
                    }
                } else
                {
                    printwriter.println(s7);
                }
            socket.close();
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
            printwriter.println("<html><head></head>");
            printwriter.println("<body><h1>\u7CFB\u7EDF\u9519\u8BEF</h1></body></html>");
        }
    }    private static int requestId = 0;
    private static String host = null;
    private static int port = 0;    static 
    {
        Locale.setDefault(Locale.CHINA);
    }
}

Answer 2

客户端看不出什么问题.凭感觉应该是在SOCKET通讯那里出了问题
你的中间件是如何实现的?有可能是你的中间层出了问题,资源耗尽,
而客户端还在等待中间层的应答而导致CUP过忙.建议检查一下中间层的代码

Answer 3

中间层服务关闭后(只运行tomcat)，服务器锻cpu占用率还是100%，
谢谢大家关注，请继续给些提示

Answer 4

我们用TOMCAT时也老死。但那是因为连接池的连接没有释放！

Answer 5

不是TOMCAT的问题，我用了这么多都是好的

Answer 6

to ：　Michael_zp(抛弃懒惰)
你指的连接池的连接是与数据库的连接吗？能详细描述一下问题的现象，原因和解决办法吗，谢谢。

Answer 7

多谢大家的帮助，问题原因基本查明，是与此系统集成的公用tomcat的系统造成的错误。
送分

Answer 8

这是tomcat3.2的固有问题，升级到4.0侯问题解决。
在错误输入url后tomcat3.2酒会拼命计算？？？