style95 commented on code in PR #5278:
URL: https://github.com/apache/openwhisk/pull/5278#discussion_r933764471


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core/controller/src/main/scala/org/apache/openwhisk/core/controller/Controller.scala:
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@@ -230,6 +233,10 @@ object Controller {
   def main(args: Array[String]): Unit = {
     implicit val actorSystem = ActorSystem("controller-actor-system")
     implicit val logger = new 
AkkaLogging(akka.event.Logging.getLogger(actorSystem, this))
+    if (useClusterBootstrap) {

Review Comment:
   AFAIK, `FPCPoolBalancer` does not need to discover different actors in a 
remote node.
   The scheduler does. `ShardingPoolBalancer` needs a cluster to determine the 
number of controller nodes.
   This is for sharding and `ShardingPoolBalancer` already has the same logic.
   
   That's why I asked if akka-cluster bootstrap is required for all load 
balancers other than `ShardingPoolBalancer`.
   



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