[jira] [Work started] (HBASE-29699) Scan#setLimit ignored in MapReduce jobs

["Junegunn Choi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-29699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-29699 started by Junegunn Choi.
---------------------------------------------
> Scan#setLimit ignored in MapReduce jobs
> ---------------------------------------
>
>                 Key: HBASE-29699
>                 URL: https://issues.apache.org/jira/browse/HBASE-29699
>             Project: HBase
>          Issue Type: Bug
>          Components: mapreduce
>            Reporter: Junegunn Choi
>            Assignee: Junegunn Choi
>            Priority: Major
>
> h2. Problem
> {{TableInputFormat}} and {{TableSnapshotInputFormat}} do not respect non-default {{limit}} values set on a Scan object.
> h2. Cause
> There are two underlying issues:
> 1. {{ProtobufUtil.toScan}} does not serialize/deserialize the {{limit}} value.
> 2. {{TableSnapshotInputFormatImpl.RecordReader}} does not apply the {{limit}} when reading rows.



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