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https://issues.apache.org/jira/browse/HADOOP-10026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788335#comment-13788335
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Ben McCann commented on HADOOP-10026:
-------------------------------------
Ok, I've attached a new patch that starts from the root directory.
There should be little risk with this as the only code change is basically just
a package rename of a few imports. I'm not sure we want to stay on old versions
of dependencies forever only to avoid changing things. The new version is much
better maintained and this seems like a pretty safe time to do it since
hadoop-openstack isn't even shipping yet. I don't understand the last question
about the minimum version of jackson needed for the new API. Jackson is used
only internally and not by any API. It includes Jackson 2.2.3 by default, but I
suppose if someone wanted (and I don't know why they would) they could replace
that with any version down to 2.0.0. You can include both Jackson 1.x and 2.x
in a project if you want since they are different packages.
> Upgrade to Jackson 2
> --------------------
>
> Key: HADOOP-10026
> URL: https://issues.apache.org/jira/browse/HADOOP-10026
> Project: Hadoop Common
> Issue Type: Task
> Reporter: Ben McCann
> Attachments: hadoop-tools-openstack-jackson.patch
>
>
> I'd like to see Hadoop upgrade to Jackson 2. This is a change that should be
> able to be made to each Hadoop project one at a time, so I've attached a
> patch for the first and will follow up with others if this one is committed.
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