FTPClient Uploading File = SocketException: Connection reset

Question

I'm trying to upload a simple txt file via FTP using XAMPP and FileZilla.
I'm using the Apache Commons Net 3.0.1 Library.
This is my code, very basic things:

FTPClient client = new FTPClient();
InputStream in = new ByteArrayInputStream("IT WORKS! :D".getBytes());

try {
    client.connect("localhost");
    client.login("user", "password");
    client.enterLocalPassiveMode();
    client.storeFile("textfile.txt", in);
} finally {
    try {
        in.close();
        client.logout();
        client.disconnect();
    } catch (Exception e) {
    }
}

But... storeFile() throws a java.net.SocketException:

Exception in thread "main" java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:189)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
    at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
    at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
    at java.io.InputStreamReader.read(InputStreamReader.java:184)
    at java.io.BufferedReader.fill(BufferedReader.java:154)
    at java.io.BufferedReader.read(BufferedReader.java:175)
    at org.apache.commons.net.io.CRLFLineReader.readLine(CRLFLineReader.java:58)
    at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:310)
    at org.apache.commons.net.ftp.FTP.__getReply(FTP.java:290)
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:474)
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:547)
    at org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:596)
    at org.apache.commons.net.ftp.FTP.pasv(FTP.java:945)
    at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:719)
    at org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:551)
    at org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:1704)
    at ftpexample.ftpexample.main(ftpprova.java:17)

What's the problem?? :( I tried also on an online hosting service, with the same result...
I wonder if this is a firewall or windows' services related problem??

Negrophobe

in my case the same error message was caused by incorrect configuration of VSFTPD: serverfault.com/questions/524695/… – Univalence

Answer 1

Solved by running this as administrator in the command prompt:

netsh advfirewall set global StatefulFTP disable

This is a Java 7 bug on Windows machines, it is reported here.

Negrophobe

I wish I had come across this answer 4 hours ago, I would have saved myself some frustration. This is exactly the same problem I was having, and this fix worked like a charm. Thank you! – Carline

Answer 2

Set:

client.setUseEPSVwithIPv4( true );

This works if you can't make changes to Window's firewall settings.

Unkennel

Answer 3

I'm honestly not sure but you should try the following:

Use something like the following code:

System.out.println(client.getReplyCode());
for(String s : client.getReplyStrings())
    System.out.println(s);

after client.login("user", "password"); to verify the status of your connection.

If you don't get any good hints from the code above, after invoking client.storeFile("textfile.txt", in); try to add client.completePendingCommand();.

Good luck! :)

Theatrician

Thank you for the answer :) i get "230 230 Logged on" by printing the replies and the same SocketException by invoking client.completePendingCommand() – Negrophobe

230 is good. I double checked and the completePendingCommand() is necessary only if you use the storeFileStream method (that you might want to try as an alternative). What line of code is throwing the exception? Is there any file created in the server (maybe empty)? – Theatrician