BOSH fails when disabling/re-enabling the port
Openfire can be configured to allow HTTP Bind / BOSH connections (in the admin panel under "Server" -> "Server Settings" -> "Http Binding"). The feature is enabled by default.
When the feature gets disabled, and the enabled again, new BOSH connections made to Openfire fail with stacktraces in the log file:
It appears that an executor service is not accepting new tasks any longer.