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https://issues.apache.org/jira/browse/HBASE-15264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15155254#comment-15155254
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Duo Zhang commented on HBASE-15264:
-----------------------------------

There is no problem if master renamed our WAL directory because we can not 
start a new WAL writer any more. This will finally cause the RS abort. And 
master will only split a log if it is closed(successfully returned from 
recoverFileLease) so we will not lose any data. asynchronously closing WAL 
writer is also OK I think. I used to miss the rename stage...

Thanks.

> Implement a fan out HDFS OutputStream
> -------------------------------------
>
>                 Key: HBASE-15264
>                 URL: https://issues.apache.org/jira/browse/HBASE-15264
>             Project: HBase
>          Issue Type: Sub-task
>          Components: util, wal
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15264-v1.patch, HBASE-15264-v2.patch, 
> HBASE-15264-v3.patch, HBASE-15264-v4.patch, HBASE-15264.patch
>
>




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