ftp4j - Too many connections exception

Question

I am creating a sync service which will copy files to ftp folder selected by user. When i run the service, it connects with ftp and check whether file at android local storage is available at ftp or not and if not, it uploads. Below is my code.

   FTPClient ftpClient = new FTPClient();
        ftpClient.setPassive(true);



            if (!ftpClient.isConnected()) {
                ftpClient.connect(server, port);
            }else {
                Log.i(TAG,"FTP already connected");
            }
            if (!ftpClient.isAuthenticated()) {
                ftpClient.login(username, password);
            }else {
                Log.i(TAG,"FTP already Logged In");
            }

            ftpClient.changeDirectory(rfolderpath);
            String[] files = ftpClient.listNames();

            if (Arrays.asList(files).contains(filename)) {
                Log.i(TAG, filename + " Already Found in FTP, Skipping");

            } else {
                Log.i(TAG, "Sending Go Ahead For Upload");
                File file = new File(filepath);
                Log.i(TAG, "Uploading File: " + filename);
                ftpClient.upload(file);
                ftpClient.logout();
                ftpClient.disconnect(true);
            }
     

The code works fine for first 8 files and then i start getting exception of too many connections (8) from this IP and my sync terminates.

Here is Error text:

it.sauronsoftware.ftp4j.FTPException [code=421, message= Too many connections (8) from this IP]

Can someone help me how to handle this scenario.

Answer 1

I changed the logic of uploading files. Now created one ftp connection under AsyncTaskLoader and with that upload all files w/o error.