From b8d617eaf05b3dc8ab8f44c38863dc14c31670a3 Mon Sep 17 00:00:00 2001
From: Thomas Kluyver <takowl@gmail.com>
Date: Fri, 15 Dec 2017 14:13:43 +0000
Subject: [PATCH] Backport PR #314: kill process group when killing kernel

---
 jupyter_client/manager.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/jupyter_client/manager.py b/jupyter_client/manager.py
index 585598c63..1b60b65a4 100644
--- a/jupyter_client/manager.py
+++ b/jupyter_client/manager.py
@@ -380,7 +380,10 @@ def _kill_kernel(self):
             # Signal the kernel to terminate (sends SIGKILL on Unix and calls
             # TerminateProcess() on Win32).
             try:
-                self.kernel.kill()
+                if hasattr(signal, 'SIGKILL'):
+                    self.signal_kernel(signal.SIGKILL)
+                else:
+                    self.kernel.kill()
             except OSError as e:
                 # In Windows, we will get an Access Denied error if the process
                 # has already terminated. Ignore it.