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https://issues.apache.org/jira/browse/HBASE-21254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16645906#comment-16645906
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Duo Zhang commented on HBASE-21254:
-----------------------------------

[~stack] I've replied on RB, so any other concerns? I think this is an 
important improvement.

> Need to find a way to limit the number of proc wal files
> --------------------------------------------------------
>
>                 Key: HBASE-21254
>                 URL: https://issues.apache.org/jira/browse/HBASE-21254
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0, 2.2.0, 2.1.1, 2.0.3
>
>         Attachments: HBASE-21254-v1.patch, HBASE-21254-v2.patch, 
> HBASE-21254.patch
>
>
> For regionserver, we have a max wal file limitation, if we reach the 
> limitation, we will trigger a flush on specific regions so that we can delete 
> old wal files. But for proc wals, we do not have this mechanism, and it will 
> be worse after HBASE-21233, as if there is an old procedure which can not 
> make progress and do not persist its state, we need to keep the old proc wal 
> file for ever...



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