Export GRPC environment variable in Python instead of in setup-env.sh (#382)

* Export GRPC logging environment variable in Python.

* Don't wipe PYTHONPATH in setup-env.sh

lib/python/ray/services.py

@@ -10,6 +10,8 @@ import config
 
 _services_env = os.environ.copy()
 _services_env["PATH"] = os.pathsep.join([os.path.dirname(os.path.abspath(__file__)), _services_env["PATH"]])
+# Make GRPC only print error messages.
+_services_env["GRPC_VERBOSITY"] = "ERROR"
 
 # all_processes is a list of the scheduler, object store, and worker processes
 # that have been started by this services module if Ray is being used in local

lib/python/ray/worker.py

@@ -654,6 +654,8 @@ def init(start_ray_local=False, num_workers=None, num_objstores=None, scheduler_
       Exception: An exception is raised if an inappropriate combination of
         arguments is passed in.
   """
+  # Make GRPC only print error messages.
+  os.environ["GRPC_VERBOSITY"] = "ERROR"
   if driver_mode == raylib.PYTHON_MODE:
     # If starting Ray in PYTHON_MODE, don't start any other processes.
     pass