markusthoemmes opened a new pull request #2476: Stabilize loadbalancer under 
on/off conditions
URL: https://github.com/apache/incubator-openwhisk/pull/2476
 
 
   If invokers are coming online/offline frequently today, the list of 
available invokers changes frequently which causes the hash-based picking 
algorithm to constantly change home invokers of actions, thus destroying 
warm-ratios of that action.
   
   This attacks this issue by accepting that invokers are in fact index based 
and thus they are now managed in an array which's length will not change if an 
invoker goes offline. For partitioning cases i.e. blackbox containers) the 
length of the underlying sequence is kept constant by padding them repsectively.
 
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