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https://issues.apache.org/jira/browse/HDFS-10560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423142#comment-15423142
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Hudson commented on HDFS-10560:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10284 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10284/])
HDFS-10560. DiskBalancer: Reuse ObjectMapper instance to improve the
(aengineer: rev b047bc7270f3461156e4d08423c728ee9c67dba5)
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancerWorkStatus.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/command/Command.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerCluster.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/datamodel/DiskBalancerVolume.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/connectors/JsonNodeConnector.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancerWorkItem.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DiskBalancer.java
> DiskBalancer: Reuse ObjectMapper instance to improve the performance
> --------------------------------------------------------------------
>
> Key: HDFS-10560
> URL: https://issues.apache.org/jira/browse/HDFS-10560
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: balancer & mover
> Affects Versions: HDFS-1312
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Attachments: HDFS-10560-HDFS-1312.001.patch,
> HDFS-10560-HDFS-1312.002.patch, HDFS-10560-HDFS-1312.003.patch,
> HDFS-10560.004.patch, HDFS-10560.005.patch
>
>
> In branch HDFS-1312, there are many places use {{ObjectMapper}} instances to
> do the json-object transform. But {{ObjectMapper}} instance is relatively
> heavy, we should reuse them as possible. And In addition, {{ObjectMapper}} is
> thread safe, can see this link:http://wiki.fasterxml.com/JacksonFAQ.
> Here are related issues: HDFS-9724, HDFS-9768. We can see detail info in this
> issues.
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