bbeaudreault commented on pull request #4147:
URL: https://github.com/apache/hbase/pull/4147#issuecomment-1057478213


   I hit an unrelated bug and some extra complexity for reverse scans. I filed 
HBASE-26790 to track the bug, since that really only affected a test but should 
be fixed separately. I just pushed some changes to fix reverse scans.
   
   The crux of the reverse scan issue is that it does some special magic to 
find the appropriate region location when using an empty start row. When a 
throwable is handled, we'd pass the empty row into updateRegionLocations and 
end up not updating anything. So we really need to update the row key for the 
found location, so I stashed that in the object member variable.


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