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https://issues.apache.org/jira/browse/HBASE-16466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15993776#comment-15993776
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Andrew Purtell commented on HBASE-16466:
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bq. We need TableMapReduceUtil.addTableCoprocessorJarsToClasspath() in 
createSubmittabelJob() method, otherwise we are getting Phoenix coprocessor 
classed not found error(I tried with Phoenix table).

That's what I thought. This doesn't belong in this patch. It belongs on a 
separate JIRA with a clear description about what the change does. Let's get 
that committed first and then come back here, if you need it somehow for 
testing this change.

> HBase snapshots support in VerifyReplication tool to reduce load on live 
> HBase cluster with large tables
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-16466
>                 URL: https://issues.apache.org/jira/browse/HBASE-16466
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbase
>    Affects Versions: 0.98.21
>            Reporter: Sukumar Maddineni
>            Assignee: Maddineni Sukumar
>             Fix For: 2.0.0
>
>         Attachments: HBASE-16466.branch-1.3.001.patch, HBASE-16466.v1.patch, 
> HBASE-16466.v2.patch, HBASE-16466.v3.patch, HBASE-16466.v4.patch
>
>
> As of now VerifyReplicatin tool is running using normal HBase scanners. If 
> you  want to run VerifyReplication multiple times on a production live 
> cluster with large tables then it creates extra load on HBase layer. So if we 
> implement snapshot based support then both in source and target we can read 
> data from snapshots which reduces load on HBase



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