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From "Yiqun Lin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10560) Reuse ObjectMapper instance to improve the performance
Date Wed, 22 Jun 2016 08:44:58 GMT
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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