Advertise service sometimes returns empty list about advertiseserver HOT 4 OPEN

Author: monzum
A possible test for this scenario may be to advertise to one of the service and then do lookup on all the services with short graceperiod. What will happen in this case, is a service that does not have the (key,value) may return an empty list first. This will cause the empty list to be returned to the application even if there is a valid result for the key on one of the other services. This would be due to race condition on which service returns the result first.

from advertiseserver.

Author: albert
Maybe we need a way to tell the lookup function to wait until all of the services have returned, instead of returning the first result it sees after the grace period?

from advertiseserver.

Author: leonwlaw
Instead of returning upon the first result returned, how about waiting for the first non-empty result? We would return the empty list only if all services return an empty list.

from advertiseserver.

Author: justinc
Replying to leonwlaw:

Instead of returning upon the first result returned, how about waiting for the first non-empty result? We would return the empty list only if all services return an empty list.

What if it is empty though? I'm more concerned about why we get an empty list in the first place. Can you look and see why / when this happens?

from advertiseserver.