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https://issues.apache.org/jira/browse/HDFS-12064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16177902#comment-16177902
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Hudson commented on HDFS-12064:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #12955 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/12955/])
HDFS-12064. Reuse object mapper in HDFS. Contributed by Hanisha Koneru.
(aengineer: rev 36fb90c93982a22df7177809c3b0ddae455ebc07)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/SlowPeerTracker.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/planner/NodePlan.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestSlowDiskTracker.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestJsonUtil.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/SlowDiskTracker.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestSlowPeerTracker.java
> Reuse object mapper in HDFS
> ---------------------------
>
> Key: HDFS-12064
> URL: https://issues.apache.org/jira/browse/HDFS-12064
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Mingliang Liu
> Assignee: Hanisha Koneru
> Priority: Minor
> Fix For: 3.1.0
>
> Attachments: HDFS-12064.001.patch, HDFS-12064.002.patch
>
>
> Currently there are a few places that are not following the recommended
> pattern of using object mapper - reuse if possible. Actually we can use
> {{ObjectReader}} or {{ObjectWriter}} to replace the object mapper in some
> places: they are straightforward and thread safe.
> The benefit is all about performance, so in unit testing code I assume we
> don't have to worry too much.
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