Openfire to openfire problem:Error creating secured outgoing session to remote server: desktop.dys.sd

Hi,everyone!

I am trying to do two openfire communicate.When I add firends at other openfire in spark,current openfire get error log:

2011.05.17 16:31:56 Error creating secured outgoing session to remote server: desktop.dys.sd(DNS lookup: desktop.dys.sd:5269)

java.io.EOFException: input contained no data

at org.xmlpull.mxp1.MXParser.fillBuf(MXParser.java:3003)

at org.xmlpull.mxp1.MXParser.more(MXParser.java:3046)

at org.jivesoftware.openfire.net.MXParser.more(MXParser.java:373)

at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1410)

at org.jivesoftware.openfire.net.MXParser.nextImpl(MXParser.java:341)

at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)

at org.jivesoftware.openfire.session.LocalOutgoingServerSession.createOutgoingSess ion(LocalOutgoingServerSession.java:317)

at org.jivesoftware.openfire.session.LocalOutgoingServerSession.authenticateDomain (LocalOutgoingServerSession.java:167)

at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.sendPa cket(OutgoingSessionPromise.java:261)

at org.jivesoftware.openfire.server.OutgoingSessionPromise$PacketsProcessor.run(Ou tgoingSessionPromise.java:238)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

spark version:2.5.8,openfire version:3.7.0

How can I do? Thandks.