kadirozde opened a new pull request #672: PHOENIX-5658 IndexTool to verify 
index rows inline
URL: https://github.com/apache/phoenix/pull/672
 
 
   IndexTool uses UngroupedAggregateRegionObserver and IndexRegionObserver 
coprocessors to build an index table on the server side. 
UngroupedAggregateRegionObserver scans a data table regions and reconstructs 
the put mutations for each scanned row and applies them on the data table with 
the REPLAY_INDEX_REBUILD_WRITES option. These mutations are then only used to 
rebuild index rows by IndexRegionObserver. This PR adds an inline verification 
feature to UngroupedAggregateRegionObserver which reads these index rows and 
verifies their content to make sure they are build correctly. 

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