porting Cluster heartbeat timings, hardened Akka.Cluster serialization

port akka/akka#27281
port akka/akka#25183
port akka/akka#24625

src/core/Akka.Cluster.Tests/ClusterHeartbeatReceiverSpec.cs

@@ -0,0 +1,35 @@
+//-----------------------------------------------------------------------
+// <copyright file="ClusterHeartbeatReceiverSpec.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using Akka.Actor;
+using Akka.Configuration;
+using Akka.TestKit;
+using Xunit;
+using Xunit.Abstractions;
+using static Akka.Cluster.ClusterHeartbeatSender;
+
+namespace Akka.Cluster.Tests
+{
+    public class ClusterHeartbeatReceiverSpec : AkkaSpec
+    {
+        public static Config Config = @"akka.actor.provider = cluster";
+
+        public ClusterHeartbeatReceiverSpec(ITestOutputHelper output)
+            : base(Config, output)
+        {
+
+        }
+
+        [Fact]
+        public void ClusterHeartbeatReceiver_should_respond_to_heartbeats_with_same_SeqNo_and_SendTime()
+        {
+            var heartbeater = Sys.ActorOf(ClusterHeartbeatReceiver.Props(() => Cluster.Get(Sys)));
+            heartbeater.Tell(new Heartbeat(Cluster.Get(Sys).SelfAddress, 1, 2));
+            ExpectMsg<HeartbeatRsp>(new HeartbeatRsp(Cluster.Get(Sys).SelfUniqueAddress, 1, 2));
+        }
+    }
+}

src/core/Akka.Cluster.Tests/ClusterHeartbeatSenderSpec.cs

@@ -0,0 +1,66 @@
+//-----------------------------------------------------------------------
+// <copyright file="ClusterHeartbeatSenderSpec.cs" company="Akka.NET Project">
+//     Copyright (C) 2009-2021 Lightbend Inc. <http://www.lightbend.com>
+//     Copyright (C) 2013-2021 .NET Foundation <https://github.com/akkadotnet/akka.net>
+// </copyright>
+//-----------------------------------------------------------------------
+
+using System.Collections.Immutable;
+using Akka.Actor;
+using Akka.Configuration;
+using Akka.TestKit;
+using Akka.Util;
+using FluentAssertions;
+using Xunit;
+using Xunit.Abstractions;
+using static Akka.Cluster.ClusterHeartbeatSender;
+
+namespace Akka.Cluster.Tests
+{
+    public class ClusterHeartbeatSenderSpec : AkkaSpec
+    {
+        class TestClusterHeartbeatSender : ClusterHeartbeatSender
+        {
+            private readonly TestProbe _probe;
+
+            public TestClusterHeartbeatSender(TestProbe probe)
+            {
+                _probe = probe;
+            }
+
+            protected override void PreStart()
+            {
+                // don't register for cluster events
+            }
+
+            protected override ActorSelection HeartbeatReceiver(Address address)
+            {
+                return Context.ActorSelection(_probe.Ref.Path);
+            }
+        }
+
+        public static readonly Config Config = @"
+            akka.loglevel = DEBUG
+            akka.actor.provider = cluster
+            akka.cluster.failure-detector.heartbeat-interval = 0.2s
+        ";
+
+        public ClusterHeartbeatSenderSpec(ITestOutputHelper output)
+            : base(Config, output){ }
+
+        [Fact]
+        public void ClusterHeartBeatSender_must_increment_heartbeat_SeqNo()
+        {
+            var probe = CreateTestProbe();
+            var underTest = Sys.ActorOf(Props.Create(() => new TestClusterHeartbeatSender(probe)));
+
+            underTest.Tell(new ClusterEvent.CurrentClusterState());
+            underTest.Tell(new ClusterEvent.MemberUp(new Member(
+                new UniqueAddress(new Address("akka", Sys.Name), 1), 1, 
+                MemberStatus.Up, ImmutableHashSet<string>.Empty, AppVersion.Zero)));
+
+            probe.ExpectMsg<Heartbeat>().SequenceNr.Should().Be(1L);
+            probe.ExpectMsg<Heartbeat>().SequenceNr.Should().Be(2L);
+        }
+    }
+}

src/core/Akka.Cluster.Tests/Serialization/ClusterMessageSerializerSpec.cs

@@ -8,11 +8,14 @@
 using System.Collections.Immutable;
 using Akka.Actor;
 using Akka.Cluster.Routing;
+using Akka.Cluster.Serialization;
 using Akka.Routing;
+using Akka.Serialization;
 using Akka.TestKit;
 using Xunit;
 using FluentAssertions;
 using Akka.Util;
+using Google.Protobuf;
 
 namespace Akka.Cluster.Tests.Serialization
 {
@@ -33,19 +36,47 @@ public ClusterMessageSerializerSpec()
         public void Can_serialize_Heartbeat()
         {
             var address = new Address("akka.tcp", "system", "some.host.org", 4711);
-            var message = new ClusterHeartbeatSender.Heartbeat(address);
+            var message = new ClusterHeartbeatSender.Heartbeat(address, -1, -1);
             AssertEqual(message);
         }
 
+        [Fact]
+        public void Can_serialize_Hearbeatv1419_later()
+        {
+            var hb = new Akka.Cluster.Serialization.Proto.Msg.Heartbeat()
+            {
+                From = Akka.Cluster.Serialization.ClusterMessageSerializer.AddressToProto(a1.Address),
+                CreationTime = 2,
+                SequenceNr = 1
+            }.ToByteArray();
+
+            var serializer = (SerializerWithStringManifest)Sys.Serialization.FindSerializerForType(typeof(ClusterHeartbeatSender.Heartbeat));
+            serializer.FromBinary(hb, Akka.Cluster.Serialization.ClusterMessageSerializer.HeartBeatManifest);
+        }
+
         [Fact]
         public void Can_serialize_HeartbeatRsp()
         {
             var address = new Address("akka.tcp", "system", "some.host.org", 4711);
             var uniqueAddress = new UniqueAddress(address, 17);
-            var message = new ClusterHeartbeatSender.HeartbeatRsp(uniqueAddress);
+            var message = new ClusterHeartbeatSender.HeartbeatRsp(uniqueAddress, -1, -1);
             AssertEqual(message);
         }
 
+        [Fact]
+        public void Can_serialize_HearbeatRspv1419_later()
+        {
+            var hb = new Akka.Cluster.Serialization.Proto.Msg.HeartBeatResponse()
+            {
+                From = Akka.Cluster.Serialization.ClusterMessageSerializer.UniqueAddressToProto(a1.UniqueAddress),
+                CreationTime = 2,
+                SequenceNr = 1
+            }.ToByteArray();
+
+            var serializer = (SerializerWithStringManifest)Sys.Serialization.FindSerializerForType(typeof(ClusterHeartbeatSender.Heartbeat));
+            serializer.FromBinary(hb, Akka.Cluster.Serialization.ClusterMessageSerializer.HeartBeatRspManifest);
+        }
+
         [Fact]
         public void Can_serialize_GossipEnvelope()
         {
@@ -191,6 +222,7 @@ private T AssertAndReturn<T>(T message)
         {
             var serializer = Sys.Serialization.FindSerializerFor(message);
             var serialized = serializer.ToBinary(message);
+            serializer.Should().BeOfType<ClusterMessageSerializer>();
             return serializer.FromBinary<T>(serialized);
         }
 

src/core/Akka.Cluster/Cluster.cs

@@ -538,10 +538,7 @@ internal void Shutdown()
                 LogInfo("Shutting down...");
                 System.Stop(_clusterDaemons);
 
-                if (_readView != null)
-                {
-                    _readView.Dispose();
-                }
+                _readView?.Dispose();
 
                 LogInfo("Successfully shut down");
             }
@@ -583,6 +580,27 @@ public InfoLogger(ILoggingAdapter log, ClusterSettings settings, Address selfAdd
                 _selfAddress = selfAddress;
             }
 
+            /// <summary>
+            /// Creates an <see cref="Akka.Event.LogLevel.DebugLevel"/> log entry with the specific message.
+            /// </summary>
+            /// <param name="message">The message being logged.</param>
+            internal void LogDebug(string message)
+            {
+                if (_log.IsDebugEnabled)
+                    _log.Debug("Cluster Node [{0}] - {1}", _selfAddress, message);
+            }
+
+            /// <summary>
+            /// Creates an <see cref="Akka.Event.LogLevel.DebugLevel"/> log entry with the specific template and arguments.
+            /// </summary>
+            /// <param name="template">The template being rendered and logged.</param>
+            /// <param name="arg1">The argument that fills in the template placeholder.</param>
+            internal void LogDebug(string template, object arg1)
+            {
+                if (_log.IsDebugEnabled)
+                    _log.Debug("Cluster Node [{1}] - " + template, arg1, _selfAddress);
+            }
+
             /// <summary>
             /// Creates an <see cref="Akka.Event.LogLevel.InfoLevel"/> log entry with the specific message.
             /// </summary>

src/core/Akka.Cluster/ClusterDaemon.cs

@@ -898,7 +898,7 @@ private void CreateChildren()
         {
             _coreSupervisor = Context.ActorOf(Props.Create<ClusterCoreSupervisor>(), "core");
 
-            Context.ActorOf(Props.Create<ClusterHeartbeatReceiver>(), "heartbeatReceiver");
+            Context.ActorOf(ClusterHeartbeatReceiver.Props(() => Cluster.Get(Context.System)), "heartbeatReceiver");
         }
 
         protected override void PostStop()