Unable to send file, XmppError service not unavailable

Hi, I am totally new to XMPP,SMACK and on OPENFIRE. following tutorials i have created this class. It is working fine but do not know is it good approach. i can do chat,register user, and and get users. now i want to send file to another user.but i am getting this error

  • Error Error :: null Exception :: org.jivesoftware.smack.XMPPException$XMPPErrorException: XMPPError: service-unavailable - cancel*

and my code is.

public void fileTransfer(String destination) throws XMPPException {

// Create the file transfer manager
FileTransferManager manager = FileTransferManager.getInstanceFor(mConnection);

// Create the outgoing file transfer
OutgoingFileTransfer transfer = manager.createOutgoingFileTransfer(destination);

// Send the file
//transfer.sendFile(new File(“abc.txt”), “You won’t believe this!”);
transfer.sendStream(new ByteArrayInputStream(dataToSend), “hello.txt”, dataToSend.length, “A greeting”);

try {


} catch (Exception e) {


System.out.println("Status :: " + transfer.getStatus() + " Error :: " + transfer.getError() + " Exception :: " + transfer.getException());

System.out.println("Is it done? " + transfer.isDone());


I would like to share my rest code also to confirm i am going in right direction. initially i found some issue in getting all registered users(i am matching them to my local contacts to get registered cotact)

this is my whole code.

SmackConnection.java · GitHub

Please Seniors check my code and guide me in right direction if i am wrong anywhere,

Thanks a lot.