Remove unnecessary handling of setproctitle and psutil. (#7702)

ci/travis/test-wheels.sh

@@ -48,7 +48,7 @@ if [[ "$platform" == "linux" ]]; then
   $PYTHON_EXE "$TEST_SCRIPT"
 
   # Run the UI test to make sure that the packaged UI works.
-  $PIP_CMD install -q aiohttp google grpcio psutil requests setproctitle
+  $PIP_CMD install -q aiohttp google grpcio requests
   $PYTHON_EXE "$UI_TEST_SCRIPT"
 
   # Check that the other wheels are present.
@@ -88,7 +88,7 @@ elif [[ "$platform" == "macosx" ]]; then
 
     if (( $(echo "$PY_MM >= 3.0" | bc) )); then
       # Run the UI test to make sure that the packaged UI works.
-      $PIP_CMD install -q aiohttp google grpcio psutil requests setproctitle
+      $PIP_CMD install -q aiohttp google grpcio requests
       $PYTHON_EXE "$UI_TEST_SCRIPT"
     fi
 

doc/requirements-doc.txt

@@ -11,11 +11,9 @@ opencv-python-headless
 pandas
 pickle5
 pygments
-psutil
 pyyaml
 recommonmark
 redis
-setproctitle
 sphinx
 sphinx-click
 sphinx-copybutton

doc/source/installation.rst

@@ -158,13 +158,6 @@ via pip.
 
   pip install ray[dashboard]
 
-If you are using Anaconda and have trouble installing ``psutil`` or
-``setproctitle``, the try
-
-.. code-block:: bash
-
-  conda install psutil setproctitle
-
 The command ``ray.init()`` or ``ray start --head`` will print out the address of
 the dashboard. For example,
 

python/ray/exceptions.py

@@ -41,10 +41,8 @@ class RayTaskError(RayError):
         """Initialize a RayTaskError."""
         if proctitle:
             self.proctitle = proctitle
-        elif setproctitle:
-            self.proctitle = setproctitle.getproctitle()
         else:
-            self.proctitle = "ray_worker"
+            self.proctitle = setproctitle.getproctitle()
         self.pid = pid or os.getpid()
         self.ip = ip or ray.services.get_node_ip_address()
         self.function_name = function_name

python/ray/services.py

@@ -1102,7 +1102,7 @@ def start_dashboard(require_webui,
         webui_dependencies_present = False
         warning_message = (
             "Failed to start the dashboard. The dashboard requires Python 3 "
-            "as well as 'pip install aiohttp psutil setproctitle grpcio'.")
+            "as well as 'pip install aiohttp grpcio'.")
         if require_webui:
             raise ImportError(warning_message)
         else:

python/ray/worker.py

@@ -677,12 +677,6 @@ def init(address=None,
     else:
         driver_mode = SCRIPT_MODE
 
-    if setproctitle is None:
-        logger.warning(
-            "WARNING: Not updating worker name since `setproctitle` is not "
-            "installed. Install this with `pip install setproctitle` "
-            "(or ray[debug]) to enable monitoring of worker processes.")
-
     if global_worker.connected:
         if ignore_reinit_error:
             logger.error("Calling ray.init() again after it has already been "
@@ -1142,8 +1136,7 @@ def connect(node,
         job_id = JobID.nil()
         # TODO(qwang): Rename this to `worker_id_str` or type to `WorkerID`
         worker.worker_id = _random_string()
-        if setproctitle:
-            setproctitle.setproctitle("ray::IDLE")
+        setproctitle.setproctitle("ray::IDLE")
     elif mode is LOCAL_MODE:
         if job_id is None:
             job_id = JobID.from_int(random.randint(1, 65535))
@@ -1369,11 +1362,9 @@ def disconnect(exiting_interpreter=False):
 
 @contextmanager
 def _changeproctitle(title, next_title):
-    if setproctitle:
-        setproctitle.setproctitle(title)
+    setproctitle.setproctitle(title)
     yield
-    if setproctitle:
-        setproctitle.setproctitle(next_title)
+    setproctitle.setproctitle(next_title)
 
 
 def register_custom_serializer(cls,