James Taylor created PHOENIX-4053:
-------------------------------------

             Summary: Lock row exclusively when necessary for mutable secondary 
indexing
                 Key: PHOENIX-4053
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4053
             Project: Phoenix
          Issue Type: Bug
            Reporter: James Taylor


In HBase 1.3, it turns out that rows are not exclusively locked when the 
preBatchMutate call is made. The mutable secondary index (global and local) 
depend on this to get a consistent snapshot of a row. This will likely get 
fixed in HBASE-18474, but we need to guard against this ourselves.



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