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https://issues.apache.org/jira/browse/HBASE-21247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16631035#comment-16631035
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Ted Yu commented on HBASE-21247:
--------------------------------

In patch v3, there are two new subtests.

* when only WALFactory.WAL_PROVIDER_CLASS is specified, verify that both wal 
provider and meta wal provider are of this class
* when only WALFactory.META_WAL_PROVIDER_CLASS is specified, verify that wal 
provider is default and that meta wal provider is of this class

> Allow WAL Provider to be specified by configuration without explicit enum in 
> Providers
> --------------------------------------------------------------------------------------
>
>                 Key: HBASE-21247
>                 URL: https://issues.apache.org/jira/browse/HBASE-21247
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: 21247.v1.txt, 21247.v2.txt, 21247.v3.txt
>
>
> Currently all the WAL Providers acceptable to hbase are specified in 
> Providers enum of WALFactory.
> This restricts the ability for additional WAL Providers to be supplied - by 
> class name.
> This issue introduces additional config which allows the specification of new 
> WAL Provider through class name.



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