From f8a6ed7832bbd9e5d2b3e30b5c3f17348bef2405 Mon Sep 17 00:00:00 2001
From: Edward Oakes <ed.nmi.oakes@gmail.com>
Date: Fri, 25 Oct 2019 13:01:35 -0700
Subject: [PATCH] Spawn processes in background sessions (#6008)

Allows us to properly handle KeyboardInterrupts in interactive python interpreters.
---
 python/ray/services.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/ray/services.py b/python/ray/services.py
index e47717f0e..3cb7474d1 100644
--- a/python/ray/services.py
+++ b/python/ray/services.py
@@ -442,7 +442,8 @@ def start_ray_process(command,
         env=modified_env,
         cwd=cwd,
         stdout=stdout_file,
-        stderr=stderr_file)
+        stderr=stderr_file,
+        preexec_fn=os.setsid)
 
     return ProcessInfo(
         process=process,