yufeng629 opened a new issue #405: Master power off may cause consumeQueue diff 
from commitLog
URL: https://github.com/apache/rocketmq/issues/405
 
 
   if there are some messages, all of then had flushed to commit log, but no 
dispatch to consumeQueue, at that moment ,the Master Broker power off, when the 
Master restart, those message will never dispatch to consumeQueue, because the 
reputFromOffset property of the ReputMessageService was set to the maxOffset of 
the last MappedFile when the DefaultMessageStore start
   
![image](https://user-images.githubusercontent.com/15260012/44012251-5339716a-9ef0-11e8-8843-b1c123f6507a.png)
   if this sitution is true, it will cause message lost
   

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