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Thread: Read Textfile from server, memory issue

  1. #1
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    Default Read Textfile from server, memory issue

    Hello, I use this code to read a textfile from my server:

    String nextLine;
           URL url = null;
           URLConnection urlConn = null;
           InputStreamReader  inStream = null;
           BufferedReader buff = null;
           try{
              url  = new URL("mytextfile.txt" );
              urlConn = url.openConnection();
              inStream = new InputStreamReader( 
              urlConn.getInputStream());
               buff= new BufferedReader(inStream);
     
     
            while (true){
                nextLine =buff.readLine();  
                if (nextLine !=null){
                    System.out.println(nextLine); 
                }
                else{
                   break;
                } 
            }
         } catch(MalformedURLException e){
           System.out.println("Please check the URL:" + 
                                               e.toString() );
         } catch(IOException  e1){
          System.out.println("Can't read  from the Internet: "+ 
                                              e1.toString() ); 
      }
     }

    I call this every 10 seconds to read the text file. The used memory is increased then every minute, and after 2/3 hours the service gets killed. I'am not sure why the memory is increased every minute. I'am not storing the string or appending it to something.
    I need to read every 10 seconds my text file and it would be very nice if there is a solution.
    Thanks


  2. #2
    Senile Half-Wit Freaky Chris's Avatar
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    Default Re: Read Textfile from server, memory issue

    Check what is going on with garbage collection? Are you creating and deleting lots of objects?
    chris[at]javaprogrammingforums[dot]com

    Prifysgol Bangor University, North Wales

  3. #3
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    Default Re: Read Textfile from server, memory issue

    I'am only creating URL, URLConnection, InputStreamReader and the BufferedReader each time. Tried to declare at the beginning and only using it without creating it again, but same result.

  4. #4
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    Default Re: Read Textfile from server, memory issue

    Ensure you close all of the connections, it's hard to see what is going on without knowing the full code. Due to the nature of the problem, I am guessing threads are also involved
    chris[at]javaprogrammingforums[dot]com

    Prifysgol Bangor University, North Wales

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    Default Re: Read Textfile from server, memory issue

    First I started a service, this service starts a this thread, which reads my text file.
    public int onStartCommand(Intent intent, int flags, int startId) {
    		executethread = new Thread(new Runnable() { public void run() { try {
    			Reader();
    		} catch (Exception e) {
    			 //TODO Auto-generated catch block
    			e.printStackTrace();
    		} } });
     
    		executethread.start(); 
     
    		return START_STICKY;
     
    	}


    public void Reader() throws Exception{
    			Thread.sleep(10000);
     
     
     
     
     
    			try{
    		          url  = new URL("mytext.txt" );
    		          urlConn = url.openConnection();
    		         inStream = new InputStreamReader( 
    		                           urlConn.getInputStream());
    		           buff= new BufferedReader(inStream);
    		           nextLine = buff.readLine();  
    		        while (true){
    		            nextLine = buff.readLine();  
    		            if (nextLine !=null){
    		                System.out.println(nextLine); 
    		            }
    		            else{
    		               break;
    		            } 
    		        }
     
     
    		     } catch(MalformedURLException e){
    		       System.out.println("Please check the URL:" + 
    		                                           e.toString() );
    		     } catch(IOException  e1){
    		      System.out.println("Can't read  from the Internet: "+ 
    		                                          e1.toString() ); 
    		  }
     
    			buff.close();
    			Reader();
     
     
    		}
     
    	}

    So now the thread calls itself again, but in future i want to add the text to the screen, but while this problem isn't solved i can't proceed...

  6. #6
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    Default Re: Read Textfile from server, memory issue

    Can you make a small, complete program that compiles, executes and shows the problem for testing?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Read Textfile from server, memory issue

    I'am compiling the last posted code in Eclipse for Android. I look up the memory consumption in settings and running services. You want the .apk?

  8. #8
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    Default Re: Read Textfile from server, memory issue

    Android???
    Are you saying this is not a Java SE application?

    EDIT: Moved to Android section
    If you don't understand my answer, don't ignore it, ask a question.

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