Phil Yang created HBASE-18122:
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             Summary: Scanner id should include more information
                 Key: HBASE-18122
                 URL: https://issues.apache.org/jira/browse/HBASE-18122
             Project: HBase
          Issue Type: Bug
            Reporter: Phil Yang
            Assignee: Phil Yang


Now the scanner id is a long number from 1 to max in a region server. Each new 
scanner will have a scanner id.
If a client has a scanner whose id is x, when the RS restart and the scanner id 
is also incremented to x or a little larger, there will be a scanner id 
collision.
So the scanner id should now be same during each time the RS restart. We can 
add the start timestamp as the highest several bits in scanner id uint64.



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