在windows上测试java创建的ping进程，报java.io.IOException: Bad file descriptor异常？请教各位是怎么回事？

[apinglee]

PingTest.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.*;
import java.lang.*;

public class PingTest  
{
    public Map collectData(Map commands) 
    {
        Set cmdEntrySet = commands.entrySet();
        String[] commandInfos = new String[cmdEntrySet.size()];

        int iCmd = 0;
        for (Iterator iterator = cmdEntrySet.iterator(); iterator.hasNext(); iCmd++)
        {
            Map.Entry cmdEntry = (Map.Entry) iterator.next();
            String command = (String) cmdEntry.getKey();
            commandInfos[iCmd] = command;
         }

        Hashtable ret = new Hashtable();
        for (int i = 0; i < commandInfos.length; i++)
        {
            Process process = null;
            BufferedReader bufferedreader = null;
            InputStream errIn = null;
            OutputStream outS = null;
            Vector data = null;
            try
            {
            	process = Runtime.getRuntime().exec(commandInfos[i]);
                InputStream inputstream = process.getInputStream();
                bufferedreader= new BufferedReader(new InputStreamReader(inputstream));
                errIn = process.getErrorStream();
                outS = process.getOutputStream();

                data = new Vector();
                int j = 0;
                String str;
                StringBuffer sb = new StringBuffer();
            	 while ((str = bufferedreader.readLine()) != null)
                 {
                     data.add(str);
                     j++;
                 }
              }
             catch (IOException e) {
            	 System.out.println(e.toString());
             }
             finally 
            	 if( bufferedreader!=null){
            		 try {
            			 bufferedreader.close();
            			 bufferedreader=null;
            		 }
            		 catch (IOException ex) {
//            			 dMsg.warn(ex.getMessage());
            		 }
            	 }else
            	if(errIn!=null){
            		 try {
            			 errIn.close();
            			 errIn=null;
            		 }
            		 catch (IOException ex) {
//            			 dMsg.warn(ex.getMessage());
            		 }
            	 }else
            	 if(outS!=null){
            		 try {
            			 outS.close();
            			 outS=null;
            		 }
            		 catch (IOException ex) {
//            			 dMsg.warn(ex.getMessage());
            		 }
            	 }
            	 if (process != null) {
            		 process.destroy();
            		 process=null;
            	 }
             }
            }
             ret.put(commandInfos[i], data);
         }
         return ret;
    }
}

PingTest2.java

import java.util.HashMap;
import java.util.Map;

public class PingTest2 {
private static int i=0;
	class ThreadTest extends Thread{
		public void run(){
			PingTest collector = new PingTest();
	        Map commandsMap = new HashMap();
	        commandsMap.put("ping 10.75.72.188","");
	        try {
	           Map Result = collector.collectData(commandsMap);
	           System.out.println("Thread"+i+":"+Result.toString());
	        }
	        catch (Exception e) {
	            //dMsg.error("ERROR", e);
	        	System.out.println(e.toString());
	        }
	        i++;
		}
	}

	public static void main(String[] argv) {
	    //MonitorTaskInfo info = new MonitorTaskInfo();
		try{
		for(int i=0;i<10000;i++){
			PingTest2 pp = new PingTest2();
			pp.new ThreadTest().start();
		
			Thread.sleep(20);
		}
			}catch(Exception e){
				System.out.println(e.toString());
			}

    
	}

}

创建到大概3000个进程左右，便报此异常，还报java.io.IOException: CreateProcess: ping 10.75.72.188 error=1450
这种错误，还报java.lang.NullPointerException空指针。
不知道是不是跟系统资源大小相关，是不是此代码有地方会引起内存泄露？
请路过老大们指点一下，谢谢！！！

[一步一个脚印]

大致看了一下.. 我认为是线程休眠时出现的问题..
public static void main(String[] argv) {
//MonitorTaskInfo info = new MonitorTaskInfo();
try{
for(int i=0;i<10000;i++){
PingTest2 pp = new PingTest2();
Thread testThread = pp.new ThreadTest().start();

testThread.sleep(20);
}
}catch(Exception e){
System.out.println(e.toString());
}


}

[apinglee]

[Quote=引用 1 楼 ybygjy 的回复:]
大致看了一下.. 我认为是线程休眠时出现的问题..
public static void main(String[] argv) {
//MonitorTaskInfo info = new MonitorTaskInfo();
try{
for(int i=0;i <10000;i++){
PingTest2 pp = new PingTest2();
Thread testThread = pp.new ThreadTest().start();

testThread.sleep(20);
}
}catch(Exception e…
[/Quote]

做这个测试实际上就是为了复现一个实际的应用程序中的故障，不知道最终是不是内存泄露造成的呢？

[胡矣]

产生io异常不知道LZ的网络状况是否良好
java中的内存泄漏请参考
http://blog.csdn.net/yirentianran/archive/2008/06/12/2537985.aspx
不过LZ这样的小程序 一般就是内存泄漏应该也不会引起系统崩溃