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java.lang.NullPointerException: 	at java.util.ArrayList.addAll(ArrayList.java:474)	at org.jivesoftware.messenger.muc.spi.IQOwnerHandler.handleItemsElement(IQOwnerHandler.java:261)	at org.jivesoftware.messenger.muc.spi.IQOwnerHandler.handleIQ(IQOwnerHandler.java:98)	at org.jivesoftware.messenger.admin.muc_002droom_002daffiliations_jsp._jspService(muc_002droom_002daffiliations_jsp.java:141)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:688)	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)	at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:822)	at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:43)	at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:813)	at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:41)	at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:813)	at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:78)	at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:813)	at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:494)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:569)	at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)	at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:624)	at org.mortbay.http.HttpContext.handle(HttpContext.java:1434)	at org.mortbay.http.HttpServer.service(HttpServer.java:896)	at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)	at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)	at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)	at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)	at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:366)	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)