Error: "...rejected from java.util.concurrent.ThreadPoolExecutor..."

Hi. I Just installed Openfire 3.9.3, and it works great in Pidgin, but when trying to log in via the Candy client, it fails and firebug returns the following:

500 Task org.jivesoftware.openfire.http.HttpSessionManager$HttpPacketSender@58b901 rejected from java.util.concurrent.ThreadPoolExecutor@8aeebf[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]

                    33ms

The only attempt at a solution I could find is at:

http://stackoverflow.com/questions/15440897/openfire-error-when-try-to-connect-v ia-http-bind

but I can't find xmpp.httpbind.worker.threads or xmpp.client.processing.threads under System Properties.

openfire warning log:

java.util.concurrent.RejectedExecutionException: Task org.jivesoftware.openfire.http.HttpSessionManager$HttpPacketSender@3ea82c rejected from java.util.concurrent.ThreadPoolExecutor@8aeebf[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]

Any suggestions please?