Thread: proxy checker keeps freezing

hi i am trying to build a proxy checker i am doing this by pinging a site for 6 secs ti check for response and this all works fine the problem is that once i have checked about 20-25 proxies netbeans freezes and nothing else happens the program is not treaded yet but i cant figure out why this keeps happening does anyone have any ideas help would be appreciated as i am a newb at a loss the program works but just freezes after a while which renders it useless thanks

none it check proxies and sets boolean fine then it just stops i get no error messages or anything it just freezes

i dont think its system related as my ubuntu system monitor aint going crazy and the rest of cpu is still going fine it allso freezes at a random number of proxies around 20-25 then it just stops priniting results the little oraange bar at the bottom of netbeans stops and nothing happens after that

--- Update ---

Originally Posted by Norm

Two basic choices:
the program is in an infinite loop
the code is blocked waiting for an event

Add lots of println statements to see which case it is.
If a loop, where is it looping
If blocked, what statement did it start executing and never finish executing.

but its just doing the sasme thing over and over if it was a problem with loop or anything it wouldint check the second proxy it would stick on first
the programe fills an ARRAYLIST AAAAAH maybe im loading to many proxyies at once ill shorten list and try brb

--- Update ---

no i was loading over 6k proxies into arraylist but have shortened it to 70 but now freezing at 3 proxies

Originally Posted by Norm

what statement is it stopping/freezing at?

k think i found the problem my code checks socks proxy proxies im using might not be sock proxys oops my stupidity gota hit the google to determine what protocol a proxy is when all you have is the ip:port? or if anyone here knows plz save me an hour otherwise ill post what i fin thanks

k still havint found the solution
the code is

     SocketAddress addr = new InetSocketAddress("119.73.3.76", 8118);//this is not sock it is http
      Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr); 
      boolean res=false;
 try{
    URL site = new URL("http://www.google.co.uk");
    HttpURLConnection inSite = (HttpURLConnection) site.openConnection(proxy);
    inSite.setConnectTimeout(9000); // mTimeout is in seconds
    inSite.connect();//connects site
            if (inSite.getResponseCode() == HttpURLConnection.HTTP_OK) {//test
                res= true;
            }else if (inSite == null) {
               System.out.println("istrm == null");
            }   
     }catch (Exception e1) {
       System.out.print("error");
    }   
    System.out.println(res+""+proxy);
 
    }
}

if i use a sock proxy this cod works fine but if its a different protocl lke http then i just freezes no error no op at all can anyone spot a way to place a trigger or throw an exception so i can then use that to trigger a differnt proxy setting thanks

it seems to stop at
inSite.connect();
so it must keep trying to connect and never give up if its the wrong protocol cos if its socks and the sock doesint work it allso wouldint connect but then it breaks after 9sec ping and trys the next

just an update .. iwent for a cup of coffe and when i came back it had finished running but it took 20ish min to timeout but the timeout is set to 9sec why doeint it time out no matter what protocol is used is a mistery to a newb like myself but its a real pain

k if anyone knows the answer to this would be great if you could reply cos it has me at a dead end but i found this code on the web that checks if a proxy is sock or http so with a bit of editing can work for me and i tought id post it here on case someone else needed it

 public static void main(String[] args) throws IOException {       
        InetSocketAddress proxyAddress = new InetSocketAddress("127.0.0.1", 9050);
        Proxy.Type proxyType;
        proxyType = detectProxyType(proxyAddress);
        System.out.println(proxyAddress + " is a " + proxyType + " proxy.");
    }
    public static Proxy.Type detectProxyType(InetSocketAddress proxyAddress)throws IOException{
        URL url = new URL("http://www.google.com");
        List<Proxy.Type> proxyTypesToTry = Arrays.asList(Proxy.Type.SOCKS, Proxy.Type.HTTP);
        for (Proxy.Type proxyType : proxyTypesToTry){
            Proxy proxy = new Proxy(proxyType, proxyAddress);
            URLConnection connection = null;//Try with SOCKS
            try{
                connection = url.openConnection(proxy);
                //Can modify timeouts if default timeout is taking too long
                //connection.setConnectTimeout(1000);
                //connection.setReadTimeout(1000);
                connection.getContent();
                //If we get here we made a successful connection
                return(proxyType);
            }catch (SocketException e) {//or possibly more generic IOException?
                //Proxy connection failed
            }
        }
        //No proxies worked if we get here
        return(null);
    }
}

i didint write this code so hope its ok to post

--- Update ---

k if anyone knows the answer to this would be great if you could reply cos it has me at a dead end but i found this code on the web that checks if a proxy is sock or http so with a bit of editing can work for me and i tought id post it here on case someone else needed it

 public static void main(String[] args) throws IOException {       
        InetSocketAddress proxyAddress = new InetSocketAddress("127.0.0.1", 9050);
        Proxy.Type proxyType;
        proxyType = detectProxyType(proxyAddress);
        System.out.println(proxyAddress + " is a " + proxyType + " proxy.");
    }
    public static Proxy.Type detectProxyType(InetSocketAddress proxyAddress)throws IOException{
        URL url = new URL("http://www.google.com");
        List<Proxy.Type> proxyTypesToTry = Arrays.asList(Proxy.Type.SOCKS, Proxy.Type.HTTP);
        for (Proxy.Type proxyType : proxyTypesToTry){
            Proxy proxy = new Proxy(proxyType, proxyAddress);
            URLConnection connection = null;//Try with SOCKS
            try{
                connection = url.openConnection(proxy);
                //Can modify timeouts if default timeout is taking too long
                //connection.setConnectTimeout(1000);
                //connection.setReadTimeout(1000);
                connection.getContent();
                //If we get here we made a successful connection
                return(proxyType);
            }catch (SocketException e) {//or possibly more generic IOException?
                //Proxy connection failed
            }
        }
        //No proxies worked if we get here
        return(null);
    }
}

i didint write this code so hope its ok to post

k so basically i had to use executerService to time the action and time it out its a pain that i never found out why connection time out failed but how and ever its working here is code

try{executor = Executors.newSingleThreadExecutor();
            Future<String> future = (Future<String>)executor.submit(new pingcheck(h));
            future.get(10, TimeUnit.SECONDS);