sijie commented on issue #1380: addBookieAndCheckCovered in RRQuorumCoverageSet 
doesn't work correctly if AcqQuorumSize is greater than (WriteQuorumSize+1)/2
URL: https://github.com/apache/bookkeeper/issues/1380#issuecomment-386413863
 
 
   > RRQuorumCoverageSet should return true for checkCovered only if all the 
writesets have atleast AckQuorum number of OKAY responses
   
   No. I don't think that is the meaning. The checkConvered here is used for 
quorum reads not for quorum writes, what you expect here is you should have at 
least one valid response from every quorum. so the check `nodesNotCovered >= 
ackQuorumSize` means if I have more "not covered" responses than ackQuorumSize, 
this quorum didn't see enough responses, the client should fail the quorum 
reads.
   
   

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