runzhiwang edited a comment on pull request #1028:
URL: https://github.com/apache/hadoop-ozone/pull/1028#issuecomment-651703240


   > Without write lock the container might be removed from ownerMap and not 
from the typeMap, which can cause inconsistency.
   
   @elek I think this case can not be avoided by only add read lock. Unless we 
read containerMap, ownerMap, typeMap in the single method with a read lock, 
Otherwise for example 1. we read  containerMap, 2. we remove container, 3. we 
read ownerMap. It will also cause inconsistency, because container exists in 
step1 but not exists in step3.


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