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https://issues.apache.org/jira/browse/HBASE-18309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240332#comment-16240332
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Reid Chan commented on HBASE-18309:
-----------------------------------
A brief description:
# each task(thread) is responsible for one directory
# files, sub directories and directory itself are supposed to be deleted in
each task, return false for partial failures (same as original version
Some discussions, i deletes the sorting part which is not a must and may add
some overhead. WDYT.
> Support multi threads to clean oldWALs
> --------------------------------------
>
> Key: HBASE-18309
> URL: https://issues.apache.org/jira/browse/HBASE-18309
> Project: HBase
> Issue Type: Improvement
> Components: wal
> Reporter: binlijin
> Assignee: Reid Chan
> Attachments: HBASE-18309.master.001.patch
>
>
> There is only one thread in LogCleaner to clean oldWALs and in our big
> cluster we find this is not enough. The number of files under oldWALs reach
> the max-directory-items limit of HDFS and cause region server crash, so we
> use multi threads for LogCleaner and the crash not happened any more.
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