Southbound Handler thread is not closed when bundle is stopped

osgi> stop 77
osgi> 2014-08-04 21:41:09.571 BST [pool-13-thread-1] INFO o.o.o.o.netvirt.SouthboundHandler - The event handler thread was interrupted, shutting down
java.lang.InterruptedException: null
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2017) ~[na:1.7.0_55]
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2052) ~[na:1.7.0_55]
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442) ~[na:1.7.0_55]
at org.opendaylight.ovsdb.openstack.netvirt.SouthboundHandler$1.run(SouthboundHandler.java:72) ~[na:na]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_55]
at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_55]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_55]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_55]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_55]