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https://issues.apache.org/jira/browse/HDFS-13820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607741#comment-16607741
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Hudson commented on HDFS-13820:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #14904 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/14904/])
HDFS-13820. Add an ability to disable CacheReplicationMonitor. (xiao: rev
335a8139f5b9004414b2942eeac5a008283a6f75)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CacheManager.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/CentralizedCacheManagement.md
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCacheDirectives.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
> Add an ability to disable CacheReplicationMonitor
> -------------------------------------------------
>
> Key: HDFS-13820
> URL: https://issues.apache.org/jira/browse/HDFS-13820
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: caching
> Affects Versions: 2.10.0, 3.2.0
> Reporter: BELUGA BEHR
> Assignee: Hrishikesh Gadre
> Priority: Minor
> Fix For: 3.2.0
>
> Attachments: HDFS-13820-001.patch, HDFS-13820-002.patch,
> HDFS-13820-003.patch
>
>
> Stating with [HDFS-6106] the loop for checking caching is set to be every 30
> seconds.
> Please implement a way to disable the {{CacheReplicationMonitor}} class if
> there are no paths specified. Adding the first cached path to the NameNode
> should kick off the {{CacheReplicationMonitor}} and when the last one is
> deleted, the {{CacheReplicationMonitor}} should be disabled again.
> Alternatively, provide a configuration flag to turn this feature off
> altogether.
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