Petabridge.Cmd actor hierarchy prints different results each time.

[seunghalee91]

Environment

• Windows 10 Pro
• Akka.Remote v1.4.10
• Akka.Cluster v1.4.10
• Petabridge.Cmd.Cluster v0.8.0.0
• Petabridge.Cmd.Common v0.8.0.0
• Petabridge.Cmd.Host v0.8.0.0
• Remotely deploy the actor using ClusterSingletonManager.

Question

• Petabridge.Cmd actor hierarchy prints different results each time.

our service

actor hierarchy -d 8 1st run

• Received unexpected ActorIdentity Warning message

[2020/10/19 18:02:34.084][   29][ WARN]akka.tcp://mls-cluster-system@127.0.0.1:9830/user/petabridge.cmd/192.168.100.70%3A9846/actor/handler/$i/$b[Petabridge.Cmd.Host.Default.Actor.ActorTracer] Received unexpected ActorIdentity: [Id=akka.tcp://mls-cluster-system@127.0.0.1:9834/remote/akka.tcp/mls-cluster-system@127.0.0.1:9830/user/ApiMasterActor/ClusterSingleton/TestClusterRole1HelloActor/c1, Subject=]

actor hierarchy -d 8 2nd run

• Received unexpected ActorIdentity Warning message

[2020/10/19 18:02:35.355][    4][ WARN]akka.tcp://mls-cluster-system@127.0.0.1:9830/user/petabridge.cmd/192.168.100.70%3A9846/actor/handler/$j/$b[Petabridge.Cmd.Host.Default.Actor.ActorTracer] Received unexpected ActorIdentity: [Id=akka://mls-cluster-system/user/ApiMasterActor/ClusterSingleton/TestClusterRole2HelloActor, Subject=[akka.tcp://mls-cluster-system@127.0.0.1:8112/remote/akka.tcp/mls-cluster-system@127.0.0.1:9830/user/ApiMasterActor/ClusterSingleton/TestClusterRole2HelloActor/c1#1502144516]]
[2020/10/19 18:02:35.451][   27][ WARN]akka.tcp://mls-cluster-system@127.0.0.1:9830/user/petabridge.cmd/192.168.100.70%3A9846/actor/handler/$j/$b[Petabridge.Cmd.Host.Default.Actor.ActorTracer] Received unexpected ActorIdentity: [Id=akka://mls-cluster-system/user/ApiMasterActor/ClusterSingleton/TestClusterRole1HelloActor, Subject=[akka.tcp://mls-cluster-system@127.0.0.1:9834/remote/akka.tcp/mls-cluster-system@127.0.0.1:9830/user/ApiMasterActor/ClusterSingleton/TestClusterRole1HelloActor/c1#1449701576]]

Why is the output different every time the actor hierarchy command?

[Aaronontheweb]

I should transfer this over to https://github.com/petabridge/petabridge.cmd-issues but it looks like Github will only let me transfer issues between repositories in the same organization. In the future if you have a Petabridge.Cmd question I'd recommend posting there.

The reasons why the results are in different orders each time is because the actor hierarchy scan is done recursively in parallel down in the actor hierarchy using wildcard ActorSelections and the completion order of those parallel tasks is arbitrary. We're able to guarantee that a parent doesn't complete its scan until its children have completed theirs and so on, all the way until we reach the specified level of depth. But we don't guarantee the completion order of siblings - i.e. the order in which two children of the /user actor complete their scans.