Delayed group messaging in openfire

I have built a chat application using an Openfire (xmpp) server. One-to-one person chats are working fine and the messages are delivered instantly. But when we send a message inside a group, the first message gets delayed and the second message is delivered instantly.

MultiUserChatManager groupChat =

MultiUserChatManager.getInstanceFor(connection).getMultiUserChat(“group_name”);

groupChat.send(“Message object”);

Why is the first message getting delayed?

MUC Creation is

MultiUserChatManager mchatManager = MultiUserChatManager.getInstanceFor(xmpptcpConnection);

MultiUserChat mchat = mchatManager.getMultiUserChat(group);

if (!mchat.isJoined()) {

Log.d(“CONNECT”, "Joining room !! " + group + " and username " + username);

boolean createNow = false;

try {

mchat.createOrJoin(username);

createNow = true;

} catch (Exception e) {

Log.d(“CONNECT”, "Error while creating the room " + group + e.getMessage());

}

if (createNow) {

Form form = mchat.getConfigurationForm();

Form submitForm = form.createAnswerForm();

List formFieldList = submitForm.getFields();

for (FormField formField : formFieldList) {

if(!FormField.Type.hidden.equals(formField.getType()) && formField.getVariable() != null) {

submitForm.setDefaultAnswer(formField.getVariable());

}

}

submitForm.setAnswer(“muc#roomconfig_persistentroom”, true);

submitForm.setAnswer(“muc#roomconfig_publicroom”, true);

mchat.sendConfigurationForm(submitForm);

//mchat.sendConfigurationForm(

// new Form(DataForm.Type.submit)); //this is to create the room immediately after join.

}

}

Log.d(“CONNECT”, “Room created!!”);

return true;

} catch (SmackException e) {

e.printStackTrace();

} catch (XMPPException.XMPPErrorException e) {

e.printStackTrace();

}