Set the process title in workers and actors (#3219)

test/runtest.py

@@ -4,6 +4,7 @@ from __future__ import print_function
 
 import os
 import re
+import setproctitle
 import string
 import subprocess
 import sys
@@ -2299,6 +2300,26 @@ def test_wait_reconstruction(shutdown_only):
     assert len(ready_ids) == 1
 
 
+def test_ray_setproctitle(shutdown_only):
+    ray.init(num_cpus=2)
+
+    @ray.remote
+    class UniqueName(object):
+        def __init__(self):
+            assert setproctitle.getproctitle() == "ray_UniqueName:__init__()"
+
+        def f(self):
+            assert setproctitle.getproctitle() == "ray_UniqueName:f()"
+
+    @ray.remote
+    def unique_1():
+        assert setproctitle.getproctitle() == "ray_worker:runtest.unique_1()"
+
+    actor = UniqueName.remote()
+    ray.get(actor.f.remote())
+    ray.get(unique_1.remote())
+
+
 @pytest.mark.skipif(
     os.getenv("TRAVIS") is None,
     reason="This test should only be run on Travis.")