Caused by: java.lang.NoClassDefFoundError: org.jivesoftware.smackx.disco.ServiceDiscoveryManager
at org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager.enableServic e(Socks5BytestreamManager.java:709)
at org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager.activate(Soc ks5BytestreamManager.java:702)
at org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager.(Socks 5BytestreamManager.java:181)
at org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager.getBytestrea mManager(Socks5BytestreamManager.java:167)
at org.jivesoftware.smackx.bytestreams.socks5.Socks5BytestreamManager$1.connection Created(Socks5BytestreamManager.java:100)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.initConnection(XMPPTCPConnection.j ava:653)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection. java:855)
at org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.ja va:364)
at com.xxx.xxx.Ejabberd.loginToChat(Ejabberd.java:311)