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Date: Wed, 22 Jun 2016 08:44:58 +0000 (UTC)
From: "Yiqun Lin (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
Message-ID: <JIRA.12981814.1466585070000.22289.1466585098109@Atlassian.JIRA>
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References: <JIRA.12981814.1466585070000@Atlassian.JIRA> <JIRA.12981814.1466585070000@arcas>
Subject: [jira] [Created] (HDFS-10560) Reuse ObjectMapper instance to
 improve the performance
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archived-at: Wed, 22 Jun 2016 08:45:00 -0000

Yiqun Lin created HDFS-10560:
--------------------------------

             Summary: 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


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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