[jira] [Created] (HBASE-21032) ScanResponse returns a partial result per cell

["Andrey Elenskiy (JIRA)" <ji...@apache.org>]

Andrey Elenskiy created HBASE-21032:
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             Summary: ScanResponse returns a partial result per cell
                 Key: HBASE-21032
                 URL: https://issues.apache.org/jira/browse/HBASE-21032
             Project: HBase
          Issue Type: Bug
          Components: Scanners
    Affects Versions: 2.1.0
         Environment: HBase 2.1.0

Hadoop 2.8.4

Java 8
            Reporter: Andrey Elenskiy
         Attachments: App.java

I have a long row with a bunch of columns that I'm scanning with setAllowPartialResults(true). In the response I'm getting the first partial being around 2MB while all of the consequent ones being 1 column per partial. After digging more, I found that each of those single column partials are preceded by a heartbeat response (zero cells). This results in two request per column to a regionserver.

I've attached code to reproduce it on hbase version 2.1.0 (it works as expected on 2.0.0 and 2.0.1).

[^App.java]

I'm fairly certain it's a serverside issue as [gohbase|https://github.com/tsuna/gohbase] client is having the same issue. I have not tried to reproduce this with multi-row scan.



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