arshadmohammad edited a comment on pull request #2331:
URL: https://github.com/apache/hbase/pull/2331#issuecomment-683616277


   When previous scan is progress return value is 0. This 0 indicates that no 
items are garbage collected. This is wrong because in actual there was not 
attempt to garbage collect any item. Purpose of this change  is to correct this 
wrong behavior to inform the user properly so they take correct actions.
   
   > By making it return -1, do we want client to wait for certain duration 
before retrying? Is that the purpose behind this change?
   
   It is up to the API user how they want to handle it.  yes, running after 
time could be one of the options


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