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https://issues.apache.org/jira/browse/HADOOP-12705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Mackrory updated HADOOP-12705:
-----------------------------------
    Attachment: HADOOP-12705.002.patch

I'd like to help with this if I can. FWIW, I ran through an upgrade to 2.8.4 
(latest). Required some very minor code changes (patch attached), but all the 
tests are looking good (including hadoop-aws) and manual testing didn't show 
any issues.

> Upgrade Jackson 2.2.3 to 2.5.3 or later
> ---------------------------------------
>
>                 Key: HADOOP-12705
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12705
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: build
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>         Attachments: HADOOP-12705.002.patch, HADOOP-12705.01.patch, 
> HADOOP-13050-001.patch
>
>
> There's no rush to do this; this is just the JIRA to track versions. However, 
> without the upgrade, things written for Jackson 2.4.4 can break ( SPARK-12807)
> being Jackson, this is a potentially dangerous update.



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