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https://issues.apache.org/jira/browse/HADOOP-17856?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-17856.
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Resolution: Won't Fix
no. use the thread stats instead
> JsonSerDeser to collect IOStatistics
> ------------------------------------
>
> Key: HADOOP-17856
> URL: https://issues.apache.org/jira/browse/HADOOP-17856
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: common
> Affects Versions: 3.3.1
> Reporter: Steve Loughran
> Priority: Minor
>
> json deserializer to build stats on reading costs, which can then be
> collected too to measure cost of ser/deser and of file IO from the
> input/output streams, if they provide it.
> Allows for committers to report costs better here.
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