fix(cluster): enable SBR downing provider — automatic failover was inert for crashes/partitions

2026-07-08 14:48:18 -04:00
parent c2230b7171
commit c3a9e708a2
2 changed files with 24 additions and 0 deletions
@@ -160,4 +160,22 @@ public class HoconBuilderTests
            TimeSpan.FromMilliseconds(7500),
            config.GetTimeSpan("akka.remote.transport-failure-detector.acceptable-heartbeat-pause"));
    }
+
+    [Fact]
+    public void BuildHocon_EnablesSplitBrainResolverDowningProvider()
+    {
+        // Review 01 [Critical]: without downing-provider-class the entire
+        // split-brain-resolver section is inert (Akka default = NoDowning) and
+        // singletons never migrate on a hard crash.
+        var node = new NodeOptions { Role = "Central", NodeHostname = "node1", RemotingPort = 8081 };
+
+        var hocon = AkkaHostedService.BuildHocon(
+            node, DefaultCluster(), new[] { "Central" },
+            TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(15));
+
+        var config = ConfigurationFactory.ParseString(hocon);
+        Assert.Equal(
+            "Akka.Cluster.SBR.SplitBrainResolverProvider, Akka.Cluster",
+            config.GetString("akka.cluster.downing-provider-class"));
+    }
 }