Closing idle session: Error

Hi…
we are facing error during connection with openfire -
INFO [TaskEngine-pool-242]: org.jivesoftware.openfire.http.HttpSessionManager - Closing idle session: username@IP_Address
WARN [Jetty-QTP-BOSH-2821]: org.jivesoftware.openfire.http.HttpBindServlet - Error when setting read listener
java.lang.IllegalStateException: state=EOF

Please can some one help to know -

  1. why this error come?
  2. How to resolve this error?

Thanks…