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
 

java/api/src/main/java/io/ray/api/id/ActorId.java

@@ -7,7 +7,7 @@ import java.util.Random;
 
 public class ActorId extends BaseId implements Serializable {
 
-  private static final int UNIQUE_BYTES_LENGTH = 12;
+  private static final int UNIQUE_BYTES_LENGTH = 4;
 
   public static final int LENGTH = JobId.LENGTH + UNIQUE_BYTES_LENGTH;
 

java/api/src/main/java/io/ray/api/id/ObjectId.java

@@ -10,7 +10,7 @@ import java.util.Random;
  */
 public class ObjectId extends BaseId implements Serializable {
 
-  public static final int LENGTH = 28;
+  public static final int LENGTH = 20;
 
   /**
    * Create an ObjectId from a ByteBuffer.

java/api/src/main/java/io/ray/api/id/UniqueId.java

@@ -11,7 +11,7 @@ import java.util.Random;
  */
 public class UniqueId extends BaseId implements Serializable {
 
-  public static final int LENGTH = 28;
+  public static final int LENGTH = 20;
   public static final UniqueId NIL = genNil();
 
   /**

java/runtime/src/test/java/io/ray/runtime/UniqueIdTest.java

@@ -1,6 +1,7 @@
 package io.ray.runtime;
 
 import io.ray.api.id.UniqueId;
+import io.ray.runtime.util.IdUtil;
 import java.nio.ByteBuffer;
 import java.util.Arrays;
 import javax.xml.bind.DatatypeConverter;
@@ -12,12 +13,12 @@ public class UniqueIdTest {
   @Test
   public void testConstructUniqueId() {
     // Test `fromHexString()`
-    UniqueId id1 = UniqueId.fromHexString("00000000123456789ABCDEF123456789ABCDEF0123456789ABCDEF00");
-    Assert.assertEquals("00000000123456789abcdef123456789abcdef0123456789abcdef00", id1.toString());
+    UniqueId id1 = UniqueId.fromHexString("00000000123456789ABCDEF123456789ABCDEF00");
+    Assert.assertEquals("00000000123456789abcdef123456789abcdef00", id1.toString());
     Assert.assertFalse(id1.isNil());
 
     try {
-      UniqueId id2 = UniqueId.fromHexString("000000123456789ABCDEF123456789ABCDEF0123456789ABCDEF00");
+      UniqueId id2 = UniqueId.fromHexString("000000123456789ABCDEF123456789ABCDEF00");
       // This shouldn't be happened.
       Assert.assertTrue(false);
     } catch (IllegalArgumentException e) {
@@ -33,16 +34,23 @@ public class UniqueIdTest {
     }
 
     // Test `fromByteBuffer()`
-    byte[] bytes = DatatypeConverter.parseHexBinary("0123456789ABCDEF0123456789ABCDEF012345670123456789ABCDEF");
-    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes, 0, 28);
+    byte[] bytes = DatatypeConverter.parseHexBinary("0123456789ABCDEF0123456789ABCDEF01234567");
+    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes, 0, 20);
     UniqueId id4 = UniqueId.fromByteBuffer(byteBuffer);
     Assert.assertTrue(Arrays.equals(bytes, id4.getBytes()));
-    Assert.assertEquals("0123456789abcdef0123456789abcdef012345670123456789abcdef", id4.toString());
+    Assert.assertEquals("0123456789abcdef0123456789abcdef01234567", id4.toString());
 
 
     // Test `genNil()`
     UniqueId id6 = UniqueId.NIL;
-    Assert.assertEquals("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase(), id6.toString());
+    Assert.assertEquals("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase(), id6.toString());
     Assert.assertTrue(id6.isNil());
   }
+
+  @Test
+  void testMurmurHash() {
+    UniqueId id = UniqueId.fromHexString("3131313131313131313132323232323232323232");
+    long remainder = Long.remainderUnsigned(IdUtil.murmurHashCode(id), 1000000000);
+    Assert.assertEquals(remainder, 787616861);
+  }
 }

python/ray/exceptions.py

@@ -142,8 +142,7 @@ class WorkerCrashedError(RayError):
     """Indicates that the worker died unexpectedly while executing a task."""
 
     def __str__(self):
-        return ("The worker died unexpectedly while executing this task. "
-                "Check python-core-worker-*.log files for more information.")
+        return "The worker died unexpectedly while executing this task."
 
 
 class RayActorError(RayError):
@@ -154,8 +153,7 @@ class RayActorError(RayError):
     """
 
     def __str__(self):
-        return ("The actor died unexpectedly before finishing this task. "
-                "Check python-core-worker-*.log files for more information.")
+        return "The actor died unexpectedly before finishing this task."
 
 
 class RaySystemError(RayError):

python/ray/includes/function_descriptor.pxi

@@ -12,7 +12,6 @@ import hashlib
 import cython
 import inspect
 import uuid
-import ray.ray_constants as ray_constants
 
 
 ctypedef object (*FunctionDescriptor_from_cpp)(const CFunctionDescriptor &)
@@ -189,8 +188,7 @@ cdef class PythonFunctionDescriptor(FunctionDescriptor):
         function_name = function.__name__
         class_name = ""
 
-        pickled_function_hash = hashlib.shake_128(pickled_function).hexdigest(
-          ray_constants.ID_SIZE)
+        pickled_function_hash = hashlib.sha1(pickled_function).hexdigest()
 
         return cls(module_name, function_name, class_name,
                    pickled_function_hash)
@@ -210,10 +208,7 @@ cdef class PythonFunctionDescriptor(FunctionDescriptor):
         module_name = target_class.__module__
         class_name = target_class.__name__
         # Use a random uuid as function hash to solve actor name conflict.
-        return cls(
-          module_name, "__init__", class_name,
-          hashlib.shake_128(
-            uuid.uuid4().bytes).hexdigest(ray_constants.ID_SIZE))
+        return cls(module_name, "__init__", class_name, str(uuid.uuid4()))
 
     @property
     def module_name(self):
@@ -273,14 +268,14 @@ cdef class PythonFunctionDescriptor(FunctionDescriptor):
         Returns:
             ray.ObjectRef to represent the function descriptor.
         """
-        function_id_hash = hashlib.shake_128()
+        function_id_hash = hashlib.sha1()
         # Include the function module and name in the hash.
         function_id_hash.update(self.typed_descriptor.ModuleName())
         function_id_hash.update(self.typed_descriptor.FunctionName())
         function_id_hash.update(self.typed_descriptor.ClassName())
         function_id_hash.update(self.typed_descriptor.FunctionHash())
         # Compute the function ID.
-        function_id = function_id_hash.digest(ray_constants.ID_SIZE)
+        function_id = function_id_hash.digest()
         return ray.FunctionID(function_id)
 
     def is_actor_method(self):

python/ray/includes/unique_ids.pxi

@@ -31,7 +31,7 @@ def check_id(b, size=kUniqueIDSize):
         raise TypeError("Unsupported type: " + str(type(b)))
     if len(b) != size:
         raise ValueError("ID string needs to have length " +
-                         str(size) + ", got " + str(len(b)))
+                         str(size))
 
 
 cdef extern from "ray/common/constants.h" nogil:

python/ray/log_monitor.py

@@ -22,7 +22,7 @@ from ray.ray_logging import setup_component_logger
 logger = logging.getLogger(__name__)
 
 # The groups are worker id, job id, and pid.
-JOB_LOG_PATTERN = re.compile(".*worker-([0-9a-f]+)-(\d+)-(\d+)")
+JOB_LOG_PATTERN = re.compile(".*worker-([0-9a-f]{40})-(\d+)-(\d+)")
 
 
 class LogFileInfo:

python/ray/ray_constants.py

@@ -19,7 +19,7 @@ def env_bool(key, default):
     return default
 
 
-ID_SIZE = 28
+ID_SIZE = 20
 
 # The default maximum number of bytes to allocate to the object store unless
 # overridden by the user.

python/ray/serialization.py

@@ -74,8 +74,7 @@ def _try_to_compute_deterministic_class_id(cls, depth=5):
         new_class_id = pickle.dumps(pickle.loads(class_id))
         if new_class_id == class_id:
             # We appear to have reached a fix point, so use this as the ID.
-            return hashlib.shake_128(new_class_id).digest(
-                ray_constants.ID_SIZE)
+            return hashlib.sha1(new_class_id).digest()
         class_id = new_class_id
 
     # We have not reached a fixed point, so we may end up with a different
@@ -83,7 +82,7 @@ def _try_to_compute_deterministic_class_id(cls, depth=5):
     # same class definition being exported many many times.
     logger.warning(
         f"WARNING: Could not produce a deterministic class ID for class {cls}")
-    return hashlib.shake_128(new_class_id).digest(ray_constants.ID_SIZE)
+    return hashlib.sha1(new_class_id).digest()
 
 
 def object_ref_deserializer(reduced_obj_ref, owner_address):

python/ray/tests/test_advanced_3.py

@@ -284,14 +284,14 @@ def test_workers(shutdown_only):
 
 
 def test_object_ref_properties():
-    id_bytes = b"0011223344556677889900001111"
+    id_bytes = b"00112233445566778899"
     object_ref = ray.ObjectRef(id_bytes)
     assert object_ref.binary() == id_bytes
     object_ref = ray.ObjectRef.nil()
     assert object_ref.is_nil()
-    with pytest.raises(ValueError, match=r".*needs to have length.*"):
+    with pytest.raises(ValueError, match=r".*needs to have length 20.*"):
         ray.ObjectRef(id_bytes + b"1234")
-    with pytest.raises(ValueError, match=r".*needs to have length.*"):
+    with pytest.raises(ValueError, match=r".*needs to have length 20.*"):
         ray.ObjectRef(b"0123456789")
     object_ref = ray.ObjectRef.from_random()
     assert not object_ref.is_nil()

python/ray/tests/test_multi_node.py

@@ -741,10 +741,10 @@ ray.get(main_wait.release.remote())
     driver1_out_split = driver1_out.split("\n")
     driver2_out_split = driver2_out.split("\n")
 
-    assert driver1_out_split[0][-1] == "1", driver1_out_split
-    assert driver1_out_split[1][-1] == "2", driver1_out_split
-    assert driver2_out_split[0][-1] == "3", driver2_out_split
-    assert driver2_out_split[1][-1] == "4", driver2_out_split
+    assert driver1_out_split[0][-1] == "1"
+    assert driver1_out_split[1][-1] == "2"
+    assert driver2_out_split[0][-1] == "3"
+    assert driver2_out_split[1][-1] == "4"
 
 
 if __name__ == "__main__":

python/ray/utils.py

@@ -50,9 +50,9 @@ def get_ray_temp_dir():
 
 
 def _random_string():
-    id_hash = hashlib.shake_128()
+    id_hash = hashlib.sha1()
     id_hash.update(uuid.uuid4().bytes)
-    id_bytes = id_hash.digest(ray_constants.ID_SIZE)
+    id_bytes = id_hash.digest()
     assert len(id_bytes) == ray_constants.ID_SIZE
     return id_bytes
 

python/ray/worker.py

@@ -345,8 +345,7 @@ class Worker:
             # actually run the function locally.
             pickled_function = pickle.dumps(function)
 
-            function_to_run_id = hashlib.shake_128(pickled_function).digest(
-                ray_constants.ID_SIZE)
+            function_to_run_id = hashlib.sha1(pickled_function).digest()
             key = b"FunctionsToRun:" + function_to_run_id
             # First run the function on the driver.
             # We always run the task locally.

src/ray/common/constants.h

@@ -18,7 +18,7 @@
 #include <stdint.h>
 
 /// Length of Ray full-length IDs in bytes.
-constexpr size_t kUniqueIDSize = 28;
+constexpr size_t kUniqueIDSize = 20;
 
 /// An ObjectID's bytes are split into the task ID itself and the index of the
 /// object's creation. This is the maximum width of the object index in bits.

src/ray/common/id.h

@@ -124,7 +124,7 @@ class JobID : public BaseID<JobID> {
 
 class ActorID : public BaseID<ActorID> {
  private:
-  static constexpr size_t kUniqueBytesLength = 12;
+  static constexpr size_t kUniqueBytesLength = 4;
 
  public:
   /// Length of `ActorID` in bytes.

src/ray/core_worker/actor_manager.cc

@@ -91,8 +91,6 @@ bool ActorManager::AddActorHandle(std::unique_ptr<ActorHandle> actor_handle,
                   std::placeholders::_1, std::placeholders::_2);
     RAY_CHECK_OK(gcs_client_->Actors().AsyncSubscribe(
         actor_id, actor_notification_callback, nullptr));
-  } else {
-    RAY_LOG(ERROR) << "Actor handle already exists " << actor_id.Hex();
   }
 
   return inserted;