Null pointer exception occuring at getReuqest() in RequestQueue.java

Hi,

we are using openfire in our chat application where this issue is being reported frequently in recent days. Initially this exception was not occuring. pFB the stach trace of the exception that was logged. Please let me know if anyone faced such issues and handled it.

2011.11.07 14:29:52 [org.jivesoftware.openfire.component.InternalComponentManager$2.error(InternalC omponentManager.java:354)]
java.lang.NullPointerException
at java.util.LinkedList.toArray(Unknown Source)
at java.util.ArrayList.(Unknown Source)
at org.jivesoftware.xmpp.workgroup.RequestQueue.getRequests(RequestQueue.java:256)
at org.jivesoftware.xmpp.workgroup.RequestQueue.removeRequest(RequestQueue.java:31 0)
at org.jivesoftware.xmpp.workgroup.dispatcher.RoundRobinDispatcher.dispatch(RoundR obinDispatcher.java:223)
at org.jivesoftware.xmpp.workgroup.dispatcher.RoundRobinDispatcher$2.run(RoundRobi nDispatcher.java:116)