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https://issues.apache.org/jira/browse/HBASE-18309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263943#comment-16263943
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Hudson commented on HBASE-18309:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #4102 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/4102/])
HBASE-18309 Support multi threads in CleanerChore (liyu: rev
2442cbb6ab5b9f1729b74361dd2bbb066d5910bd)
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/cleaner/TestLogsCleaner.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/cleaner/TestCleanerChore.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/HFileCleaner.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/LogCleaner.java
> Support multi threads in CleanerChore
> -------------------------------------
>
> Key: HBASE-18309
> URL: https://issues.apache.org/jira/browse/HBASE-18309
> Project: HBase
> Issue Type: Improvement
> Reporter: binlijin
> Assignee: Reid Chan
> Fix For: 3.0.0, 2.0.0-beta-1
>
> Attachments: HBASE-18309.master.001.patch,
> HBASE-18309.master.002.patch, HBASE-18309.master.004.patch,
> HBASE-18309.master.005.patch, HBASE-18309.master.006.patch,
> HBASE-18309.master.007.patch, HBASE-18309.master.008.patch,
> HBASE-18309.master.009.patch, HBASE-18309.master.010.patch,
> HBASE-18309.master.011.patch, HBASE-18309.master.012.patch,
> space_consumption_in_archive.png
>
>
> 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.
> What's more, currently there's only one thread iterating the archive
> directory, and we could use multiple threads cleaning sub directories in
> parallel to speed it up.
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