[Core] `ray.get_runtime_context().namespace` returns incorrect namespace in Actor Tasks about ray HOT 5 OPEN

maybe it is not a bug in local mode

look at this code in ray/src/ray/core_worker/core_worker.cc

from ray.

@jjyao @kevin85421 #45025 i add a api to support this issue

from ray.

ray.get_runtime_context() returns the job config for entire Ray job, not specific task/actor.

Ray does provide an API to access specific actor via ray.get_actor(<name>, <namespace>). But you have to specify namespace with that.

For this issue, it is using the API for the wrong job IMHO.

May I ask what's your use case to get the namespace inside the actor? Because in your code you can easily pass down the namespace to the actor.

from ray.

ray.get_runtime_context() returns the job config for entire Ray job, not specific task/actor.

Hmm. The RuntimeContext's constructor is initialized with a worker process. I believe that RuntimeContext is specific to each worker process (task/actor). I also performed a simple experiment. Do I miss anything?

import ray

ray.init()

@ray.remote
def f():
    runtime_context = ray.get_runtime_context()
    print("Ray task")
    print("Job", ray.get_runtime_context().get_job_id())
    print("Task", ray.get_runtime_context().get_task_id())
    print("Actor", ray.get_runtime_context().get_actor_id())

@ray.remote
class actor:
    def __init__(self):
        pass
    def print_message(self):
        runtime_context = ray.get_runtime_context()
        print("Ray actor")
        print("Job", ray.get_runtime_context().get_job_id())
        print("Task", ray.get_runtime_context().get_task_id())
        print("Actor", ray.get_runtime_context().get_actor_id())

task_obj_ref = f.remote()
ray.get(task_obj_ref)

actor_instance = actor.remote()
ray.get(actor_instance.print_message.remote())

from ray.

Thanks for following up. As @kevin85421 said here, an api that returns the actor's namespace suffice my use case.

from ray.