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Cannot get conference info and join

I am using smack 4.3.4 in android app side.
Server side am using openfire 4.5.4.
I was joined in one conference and suddenly got network issue.
When I reconnected found cant join room again it.
Then i tried to get RoomInfo am getting error. am getting error

W/System.err: org.jivesoftware.smack.SmackException$NoResponseException: No response received within reply timeout. Timeout was 5000ms (~5s). Waited for response using: IQReplyFilter: iqAndIdFilter (AndFilter: (OrFilter: (IQTypeFilter: type=error, IQTypeFilter: type=result), StanzaIdFilter: id=Lgh0y-32)), : fromFilter (OrFilter: (FromMatchesFilter (full): friendslove@conference.hoivia.com)).
W/System.err: at org.jivesoftware.smack.StanzaCollector.nextResultOrThrow(StanzaCollector.java:265)
W/System.err: at org.jivesoftware.smack.StanzaCollector.nextResultOrThrow(StanzaCollector.java:219)
at org.jivesoftware.smackx.disco.ServiceDiscoveryManager.discoverInfo(ServiceDiscoveryManager.java:531)
at org.jivesoftware.smackx.disco.ServiceDiscoveryManager.discoverInfo(ServiceDiscoveryManager.java:505)
at org.jivesoftware.smackx.muc.MultiUserChatManager.getRoomInfo(MultiUserChatManager.java:332)

I assumed that it because of client side. So i tried other third party apps such as miranda IM, Xabber

But it not fixed at all.I restart openfire by
sudo service openfire stop
sudo service openfire start

also i replaced xmppserver4.5.5alpha.jar in openfire library directory.

but am not getting why it happening. Please help me guyies. Why I can’t join and get info of some conference.