Error connecting Spectrum2 with OpenFire 4

Hello experts,

I have setup Openfire with Spectrum2 as per the document but Spectrum2 is unable to connect to Openfire due to below error in the OF logs.

2016.05.31 18:09:37 org.jivesoftware.openfire.nio.ConnectionHandler - Closing connection due to error while processing message: <stream:stream xmlns="jabber:component:accept" xmlns:stream="http://etherx.jabber.org/streams" to="x.y.com" version="1.0">

java.lang.StringIndexOutOfBoundsException: String index out of range: -1

        at java.lang.String.substring(String.java:1911)

        at org.jivesoftware.openfire.session.LocalComponentSession.createSession(LocalComp onentSession.java:115)

        at org.jivesoftware.openfire.net.ComponentStanzaHandler.createSession(ComponentSta nzaHandler.java:218)

        at org.jivesoftware.openfire.net.StanzaHandler.createSession(StanzaHandler.java:64 1)

        at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:134)

        at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:181)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceive d(DefaultIoFilterChain.java:690)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(D efaultIoFilterChain.java:417)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilt erChain.java:47)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceiv ed(DefaultIoFilterChain.java:765)

        at org.apache.mina.core.filterchain.IoFilterAdapter.messageReceived(IoFilterAdapte r.java:109)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(D efaultIoFilterChain.java:417)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilt erChain.java:47)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceiv ed(DefaultIoFilterChain.java:765)

        at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flus h(ProtocolCodecFilter.java:407)

        at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:236)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(D efaultIoFilterChain.java:417)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1200(DefaultIoFilt erChain.java:47)

        at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceiv ed(DefaultIoFilterChain.java:765)

        at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:74)

        at org.apache.mina.core.session.IoEvent.run(IoEvent.java:63)

        at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(Ordere dThreadPoolExecutor.java:769)

        at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(Order edThreadPoolExecutor.java:761)

        at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThr eadPoolExecutor.java:703)

        at java.lang.Thread.run(Thread.java:745)

Can someone help me out on this?. I am clueless here.

This is the error in Spectrum2 logs

2016-05-31 18:09:52,878 INFO  XMPPFrontend: Connecting XMPP server 127.0.0.1 port 5275

2016-05-31 18:09:52,878 INFO  Component.RAW: RAW DATA OUT <?xml version="1.0"?><stream:stream xmlns="jabber:component:accept" xmlns:stream="http://etherx.jabber.org/streams" to="x.y.com" version="1.0">

2016-05-31 18:09:52,882 INFO  Component: Disconnected from Frontend server. Error: Connection read error

My Server is Ubuntu 14.04, Thanks