Got this response while joining user to the MUC Room:
No response from server.:
at org.jivesoftware.smackx.muc.MultiUserChat.join(MultiUserChat.java:498)
at org.jivesoftware.smackx.muc.MultiUserChat.join(MultiUserChat.java:392)
Above error is followed by:
java.lang.IllegalStateException: Not connected to server.
at org.jivesoftware.smack.XMPPConnection.sendPacket(XMPPConnection.java:445)
It works for sometime but later these above error comes.