jiajunwang commented on issue #363: Fix the race condition while Helix refresh 
cluster status cache.
URL: https://github.com/apache/helix/pull/363#issuecomment-516551473
 
 
   Thanks for reviewing. About the ConcurrentHashMap, I agree this becomes an 
overkill with this change. But the next move to get rid of it is not trivial. 
Better to do it once we restart the cache refactor work.
   As I commented in this thread, my idea is moving these flag, state info into 
the cache objects instead of the data provider. In this way, we won't have this 
map at all.

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