Add automatic local GC and plasma debug logs every 10 minutes by default (#12804)

python/ray/tests/test_global_gc.py

@@ -15,6 +15,43 @@ from ray.internal.internal_api import global_gc
 logger = logging.getLogger(__name__)
 
 
+def test_auto_local_gc(shutdown_only):
+    ray.init(num_cpus=2, _system_config={"local_gc_interval_s": 1})
+
+    class ObjectWithCyclicRef:
+        def __init__(self):
+            self.loop = self
+
+    @ray.remote(num_cpus=1)
+    class GarbageHolder:
+        def __init__(self):
+            gc.disable()
+            x = ObjectWithCyclicRef()
+            self.garbage = weakref.ref(x)
+
+        def has_garbage(self):
+            return self.garbage() is not None
+
+    try:
+        gc.disable()
+
+        # Local driver.
+        local_ref = weakref.ref(ObjectWithCyclicRef())
+
+        # Remote workers.
+        actors = [GarbageHolder.remote() for _ in range(2)]
+        assert local_ref() is not None
+        assert all(ray.get([a.has_garbage.remote() for a in actors]))
+
+        def check_refs_gced():
+            return (local_ref() is None and
+                    not any(ray.get([a.has_garbage.remote() for a in actors])))
+
+        wait_for_condition(check_refs_gced)
+    finally:
+        gc.enable()
+
+
 def test_global_gc(shutdown_only):
     cluster = ray.cluster_utils.Cluster()
     for _ in range(2):