ningyougang commented on a change in pull request #3272: improve loadbalancer's
schedule algorithm
URL:
https://github.com/apache/incubator-openwhisk/pull/3272#discussion_r167428428
##########
File path:
core/controller/src/main/scala/whisk/core/loadBalancer/ContainerPoolBalancer.scala
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@@ -345,7 +345,8 @@ object ContainerPoolBalancer extends LoadBalancerProvider {
.find(_._3 < invokerBusyThreshold)
.orElse(invokerProgression.find(_._3 < invokerBusyThreshold * 2))
.orElse(invokerProgression.find(_._3 < invokerBusyThreshold * 3))
- .orElse(invokerProgression.headOption)
+ .orElse(
+ if (invokerProgression.size == 0) None else
invokerProgression.lift(Random.nextInt(invokerProgression.size)))
Review comment:
`invokerProgression` here, doesn't have `nonEmpty` method.
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