Results returned from RPC calls may now be returned as partials
When is a Result marked as a partial?
When the server must stop the scan because the max size limit has been reached. Means that the LAST Result returned within the ScanResult's Result array may be marked as a partial if the scan's max size limit caused it to stop in the middle of a row.
Incompatible Change: The return type of InternalScanners#next and RegionScanners#nextRaw has been changed to NextState from boolean
The previous boolean return value can be accessed via NextState#hasMoreValues()
Provides more context as to what happened inside the scanner
Scan caching default has been changed to Integer.Max_Value
This value works together with the new maxResultSize value from
HBASE-12976 (defaults to 2MB)
Results returned from server on basis of size rather than number of rows
Provides better use of network since row size varies amongst tables
Protobuf models have changed for Result, ScanRequest, and ScanResponse to support new partial Results
Partial Results should be invisible to application layer unless Scan#setAllowPartials is set
Scan#setAllowPartials has been added to allow the application to request to see the partial Results returned by the server rather than have the ClientScanner form the complete Result prior to returning it to the application
To disable the use of partial Results on the server, set ScanRequest.Builder#setClientHandlesPartials() to be false in the ScanRequest issued to server
Partial Results should allow the server to return large rows in parts rather than accumulate all the cells for that particular row and run out of memory
HBASE-13193 RegionScannerImpl filters should not be reset if a partial Result is returned
HBASE-15484 Correct the semantic of batch and partial
HBASE-13071 Hbase Streaming Scan Feature
