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https://issues.apache.org/jira/browse/HBASE-21247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16646788#comment-16646788
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Ted Yu commented on HBASE-21247:
--------------------------------
Stepping thru the code a few times, I kept coming to the code in
getProviderClass() which Sean showed above (where key is "hbase.wal.provider"):
{code}
java.lang.IllegalArgumentException: No enum constant
org.apache.hadoop.hbase.wal.WALFactory.Providers.org.apache.hadoop.hbase.wal.IOTestProvider
{code}
Upon which the code would return AsyncFSWALProvider - the default provider.
> 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, 21247.v4.tst,
> 21247.v4.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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