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https://issues.apache.org/jira/browse/HBASE-17584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15900677#comment-15900677
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Duo Zhang commented on HBASE-17584:
-----------------------------------
OK, I found this in our documentation.
{noformat}
New APIs introduced in a patch version will only be added in a source
compatible way [1]: i.e. code that implements public APIs will continue to
compile.
{noformat}
So it seems that for a minor release we are allowed to add new APIs that breaks
source compatibility? Good.
> 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
> Assignee: Duo Zhang
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-17584.patch, HBASE-17584-v1.patch
>
>
> 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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