How to make akka-tree work with akka.net cluster?

Question

I am currently looking for a visualizer for akka.net (.NET version). I found none so I am wondering if there is any way to make akka-tree (scale) and akka.net cluster work together. I guess if both framework are following the same spec then it should work. is it?

I tried asking this question in akka-tree but no response so I am trying my luck here.

https://github.com/nraychaudhuri/akka-tree/issues/15

I am not familiar with scale but I did the following changes.

I tried adding the UDP configuration in my akka.net sample because I think this visualizer is using UDP.

        helios.udp {
              port = 9003 # needs to be on a different port or IP than TCP
              hostname = localhost
          }

And then, I tried to change the IP address in this file akka-tree\visualizer\app\controllers\Application.scala

            val group = InetAddress.getByName("127.0.0.1");

But, doesn't work.. Any idea how to make it work? Thanks!

Update:

I tried using TCP but doesn't work.

I am getting the exception below when I access the webpage "localhost:90000". I am not familiar with Scale but I think it has something to do with scale installation. I did install scale and java on my machine tho..

[info] Compiling 1 Scala source to D:\git\akka-tree\visualizer\target\scala-2.11 \classes... [info] play - Application started (Dev) [error] application -

! Internal server error, for (GET) [/] ->

java.lang.ExceptionInInitializerError: null at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] at play.core.Router$HandlerInvokerFactory$$anon$13$$anon$14.call(Router. scala:217) ~[play_2.11-2.3.7.jar:2.3.7] at play.core.Router$Routes$TaggingInvoker.call(Router.scala:464) ~[play_ 2.11-2.3.7.jar:2.3.7] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1.apply(routes_routing. scala:72) ~[na:na] Caused by: java.net.SocketException: Not a multicast address at java.net.MulticastSocket.joinGroup(Unknown Source) ~[na:1.8.0_51] at controllers.Application$.(Application.scala:16) ~[na:na] at controllers.Application$.(Application.scala) ~[na:na] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] [error] application - Error while rendering default error page scala.MatchError: java.lang.ExceptionInInitializerError (of class java.lang.Exce ptionInInitializerError) at play.api.GlobalSettings$class.onError(GlobalSettings.scala:148) ~[pla y_2.11-2.3.7.jar:2.3.7] at play.api.DefaultGlobal$.onError(GlobalSettings.scala:206) [play_2.11- 2.3.7.jar:2.3.7] at play.core.server.Server$class.logExceptionAndGetResult$1(Server.scala :63) [play_2.11-2.3.7.jar:2.3.7] at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:7 3) [play_2.11-2.3.7.jar:2.3.7] at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:7 1) [play_2.11-2.3.7.jar:2.3.7] [error] application -

! Internal server error, for (HEAD) [/] ->

java.lang.NoClassDefFoundError: Could not initialize class controllers.Applicati on$ at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1$$anonfun$apply$1.appl y(routes_routing.scala:72) ~[na:na] at play.core.Router$HandlerInvokerFactory$$anon$13$$anon$14.call(Router. scala:217) ~[play_2.11-2.3.7.jar:2.3.7] at play.core.Router$Routes$TaggingInvoker.call(Router.scala:464) ~[play_ 2.11-2.3.7.jar:2.3.7] at Routes$$anonfun$routes$1$$anonfun$applyOrElse$1.apply(routes_routing. scala:72) ~[na:na] [error] application - Error while rendering default error page scala.MatchError: java.lang.NoClassDefFoundError: Could not initialize class con trollers.Application$ (of class java.lang.NoClassDefFoundError) at play.api.GlobalSettings$class.onError(GlobalSettings.scala:148) ~[pla y_2.11-2.3.7.jar:2.3.7] at play.api.DefaultGlobal$.onError(GlobalSettings.scala:206) [play_2.11- 2.3.7.jar:2.3.7] at play.core.server.Server$class.logExceptionAndGetResult$1(Server.scala :63) [play_2.11-2.3.7.jar:2.3.7] at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:7 3) [play_2.11-2.3.7.jar:2.3.7] at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:7 1) [play_2.11-2.3.7.jar:2.3.7]

Are you sure it's not a transport layer issue? UDP is second-class-citizen transport option at the moment, so maybe when you decide to use TCP instead, it may fix your problem? — Bartosz Sypytkowski
@Horusiath Thanks! I did try with TCP but got the same error. I updated my posted with error detail. Any idea about that error? Thanks again! — Michael Sync

simonpetty simonpetty · Accepted Answer · 2017-01-04T20:46:26

I'm not the author but there's a 'very very alpha version' of the visualizer ported to .NET (from Aug '16) available on nuget https://www.nuget.org/profiles/corneliutusnea with source here https://github.com/corneliutusnea/Akka.Visualizer

How to make akka-tree work with akka.net cluster?

2 Answers