After a while, controller goes into a tight infinite loop catching I/O exceptions

If I leave opendaylight running with mininet connected for a while (doing nothing else), I eventually get a stream of errors like below and the CPU jumps to 100%. I'm not yet sure what causes this, but I've had it happen a few times, so it's definitely repeatable.

2013-03-23 16:46:50.298 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.298 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.298 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.298 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.298 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.299 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.300 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection
2013-03-23 16:46:50.301 PDT [ControllerI/O Thread] ERROR o.o.c.p.o.core.internal.Controller - Caught I/O Exception when trying to accept a new connection