[GCS] Monitor.py bug fix (#8725)

* comment.

* Fix bugs.

* Used pubsub message instead.

* Added a ray.actors test

python/ray/dashboard/dashboard.py

@@ -844,7 +844,8 @@ class NodeStats(threading.Thread):
                                 "type": error_data.type
                             })
                     elif channel == str(actor_channel):
-                        gcs_entry = ray.gcs_utils.GcsEntry.FromString(data)
+                        gcs_entry = ray.gcs_utils.PubSubMessage.FromString(
+                            data)
                         actor_data = ray.gcs_utils.ActorTableData.FromString(
                             gcs_entry.entries[0])
                         addr = (actor_data.address.ip_address,

python/ray/monitor.py

@@ -121,8 +121,8 @@ class Monitor:
             unused_channel: The message channel.
             data: The message data.
         """
-        gcs_entries = ray.gcs_utils.GcsEntry.FromString(data)
-        job_data = gcs_entries.entries[0]
+        pub_message = ray.gcs_utils.PubSubMessage.FromString(data)
+        job_data = pub_message.data
         message = ray.gcs_utils.JobTableData.FromString(job_data)
         job_id = message.job_id
         if message.is_dead:

python/ray/state.py

@@ -216,7 +216,7 @@ class GlobalState:
 
         if actor_id is not None:
             actor_id = ray.ActorID(hex_to_binary(actor_id))
-            actor_info = self._aglobal_state_accessor.get_actor_info(actor_id)
+            actor_info = self.global_state_accessor.get_actor_info(actor_id)
             if actor_info is None:
                 return {}
             else:

python/ray/tests/test_global_state.py

@@ -106,6 +106,28 @@ def test_global_state_actor_table(ray_start_regular):
     assert get_state() == dead_state
 
 
+def test_global_state_actor_entry(ray_start_regular):
+    @ray.remote
+    class Actor:
+        def ready(self):
+            pass
+
+    # actor table should be empty at first
+    assert len(ray.actors()) == 0
+
+    a = Actor.remote()
+    b = Actor.remote()
+    ray.get(a.ready.remote())
+    ray.get(b.ready.remote())
+    assert len(ray.actors()) == 2
+    a_actor_id = a._actor_id.hex()
+    b_actor_id = b._actor_id.hex()
+    assert ray.actors(actor_id=a_actor_id)["ActorID"] == a_actor_id
+    assert ray.actors(actor_id=a_actor_id)["State"] == 1
+    assert ray.actors(actor_id=b_actor_id)["ActorID"] == b_actor_id
+    assert ray.actors(actor_id=b_actor_id)["State"] == 1
+
+
 if __name__ == "__main__":
     import pytest
     import sys