[GitHub] [hbase] wchevreuil commented on issue #966: HBASE-23620 KeyPrefixRegionSplitPolicy may cause split to fail when s…

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wchevreuil commented on issue #966: HBASE-23620 KeyPrefixRegionSplitPolicy may cause split to fail when s…
URL: https://github.com/apache/hbase/pull/966#issuecomment-573623324
 
 
   This specific case was a customer using [yarn timeline service v2](https://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html). Internally, it defines a KPRSP with prefix length of 4, which in this case had problems to split regions for rows representing entries for 'hdfs' user.  YARN-10077 has been filled to increase the prefix length in the table definition.
   
   > If you do not need this assumption then just do not use this policy?
   
   Some applications may not need it as a strict rule. @Apache9 arguments, though, are valid. Maybe a better solution then is to implement this flexible behaviour as another policy (like @saintstack suggested). But for KPRSP, I think it should at least apply the validation and throw an exception if it can't get a valid split point, other than leaving the procedure moving forward and failing further to perform the split. 
   
   

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