I am interested to know the internal implementation of hbase, so I'd like to
deep into the source source.
I found that the variable onlineRegions in HRegionServer is a map type and
the key is the hashcode of region name. So wont't it cause conflict ? I mean
tow region name may have the same hashcode. Or does the hash code
implemetation guarantee that two region name won't have the same hashcode ?