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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17584) Expose ScanMetrics with ResultScanner rather than Scan
Date Thu, 23 Feb 2017 13:10:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15880393#comment-15880393

Duo Zhang commented on HBASE-17584:

We will reset the counters in ScanMetrics when calling ScanMetrics.getMetricsMap so it is
a little difficult to expose it in two ways...

> Expose ScanMetrics with ResultScanner rather than Scan
> ------------------------------------------------------
>                 Key: HBASE-17584
>                 URL: https://issues.apache.org/jira/browse/HBASE-17584
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client, mapreduce, scan
>    Affects Versions: 2.0.0, 1.4.0
>            Reporter: Duo Zhang
>             Fix For: 2.0.0, 1.4.0
> I think this have been discussed many times... It is a bad practice to directly modify
the Scan object passed in when calling getScanner. The reason that we can not use a copy is
we need to use the Scan object to expose scan metrics. So we need to find another way to expose
the metrics.

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