Revert "Increase the number of unique bits for actors to avoid handle collisions (#12894)" (#12988)

This reverts commit 3e492a79ec.

dashboard/modules/stats_collector/tests/test_stats_collector.py

@@ -112,16 +112,20 @@ def test_memory_table(disable_aiohttp_cache, ray_start_with_dashboard):
     def check_mem_table():
         resp = requests.get(f"{webui_url}/memory/memory_table")
         resp_data = resp.json()
-        assert resp_data["result"]
+        if not resp_data["result"]:
+            return False
         latest_memory_table = resp_data["data"]["memoryTable"]
         summary = latest_memory_table["summary"]
-        # 1 ref per handle and per object the actor has a ref to
-        assert summary["totalActorHandles"] == len(actors) * 2
-        # 1 ref for my_obj
-        assert summary["totalLocalRefCount"] == 1
+        try:
+            # 1 ref per handle and per object the actor has a ref to
+            assert summary["totalActorHandles"] == len(actors) * 2
+            # 1 ref for my_obj
+            assert summary["totalLocalRefCount"] == 1
+            return True
+        except AssertionError:
+            return False
 
-    wait_until_succeeded_without_exception(
-        check_mem_table, (AssertionError, ), timeout_ms=1000)
+    wait_for_condition(check_mem_table, 10)
 
 
 def test_get_all_node_details(disable_aiohttp_cache, ray_start_with_dashboard):

dashboard/tests/test_memory_utils.py

@@ -7,9 +7,8 @@ from ray.new_dashboard.memory_utils import (
 NODE_ADDRESS = "127.0.0.1"
 IS_DRIVER = True
 PID = 1
-
-OBJECT_ID = "ZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZmZg=="
-ACTOR_ID = "fffffffffffffffffffffffffffffffff66d17ba010000c801000000"
+OBJECT_ID = "7wpsIhgZiBz/////AQAAyAEAAAA="
+ACTOR_ID = "fffffffffffffffff66d17ba010000c801000000"
 DECODED_ID = decode_object_ref_if_needed(OBJECT_ID)
 OBJECT_SIZE = 100