[jira] [Assigned] (PHOENIX-5344) MapReduce Jobs Over Salted Snapshots Give Wrong Results

["Akshita Malhotra (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-5344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Akshita Malhotra reassigned PHOENIX-5344:
-----------------------------------------

    Assignee: Akshita Malhotra

> MapReduce Jobs Over Salted Snapshots Give Wrong Results
> -------------------------------------------------------
>
>                 Key: PHOENIX-5344
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5344
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: Geoffrey Jacoby
>            Assignee: Akshita Malhotra
>            Priority: Major
>
> I'm modifying an existing MapReduce job to use Phoenix's MapReduce / HBase snapshot integration. When testing, I noticed that existing tests that had previously worked for this job when running on salted Phoenix tables began to fail when running on a snapshot of those tables. They pass when running identical logic against the live table. Unsalted tables give the same, correct result whether running against a live table or a snapshot. 
> The symptom on the salted snapshots is that the row count is way too high (a factor of about 7x), but the exact amount appears non-deterministic. 
> My working theory is that somewhere the snapshot MapReduce integration for Phoenix sets up the scans improperly for salted tables.



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