Merge pull request #164 from minrk/inprocess-thread-leak

inprocess: cleanup iopub thread on shutdown

Author: takluyver

ipykernel/inprocess/manager.py

@@ -46,6 +46,7 @@ def start_kernel(self, **kwds):
         self.kernel = InProcessKernel(parent=self, session=self.session)
 
     def shutdown_kernel(self):
+        self.kernel.iopub_thread.stop()
         self._kill_kernel()
 
     def restart_kernel(self, now=False, **kwds):