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https://issues.apache.org/jira/browse/HDFS-14612?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17058320#comment-17058320
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Hudson commented on HDFS-14612:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #18047 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/18047/])
HDFS-14612. SlowDiskReport won't update when SlowDisks is always empty
(inigoiri: rev 0695f7a538fb81cc5e36d0b9187df39822bb24f4)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/SlowDiskTracker.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestSlowDiskTracker.java
> SlowDiskReport won't update when SlowDisks is always empty in heartbeat
> -----------------------------------------------------------------------
>
> Key: HDFS-14612
> URL: https://issues.apache.org/jira/browse/HDFS-14612
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haibin Huang
> Assignee: Haibin Huang
> Priority: Major
> Fix For: 3.3.0
>
> Attachments: HDFS-14612-001.patch, HDFS-14612-002.patch,
> HDFS-14612-003.patch, HDFS-14612-004.patch, HDFS-14612-005.patch,
> HDFS-14612-006.patch, HDFS-14612-007.patch, HDFS-14612-008.patch,
> HDFS-14612.patch
>
>
> I found SlowDiskReport won't update when slowDisks is always empty in
> org.apache.hadoop.hdfs.server.blockmanagement.*handleHeartbeat*, this may
> lead to outdated SlowDiskReport alway staying in jmx of namenode until next
> time slowDisks isn't empty. So i think this method
> *checkAndUpdateReportIfNecessary()* should be called firstly when we want to
> get the jmx information about SlowDiskReport, this can keep the
> SlowDiskReport on jmx alway valid.
>
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