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https://issues.apache.org/jira/browse/HDFS-11233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15744111#comment-15744111
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Akira Ajisaka commented on HDFS-11233:
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Thanks [~linyiqun] for the comment and the patch.
branch-2 are using Jackson 1 and 2 at the same time, so I thought probably
branch-2 is using the deprecated APIs of Jackson 2. Therefore I asked you to
provide a patch. However, branch-2 is actually using Jackson 1 APIs and is not
using deprecated APIs of Jackson 2. I don't want to upgrade from Jackson1 to
Jackson2 in this jira, so I'd like to close this issue. Thanks a lot!
> Fix javac warnings related to the deprecated APIs after upgrading Jackson
> -------------------------------------------------------------------------
>
> Key: HDFS-11233
> URL: https://issues.apache.org/jira/browse/HDFS-11233
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.0.0-alpha2
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Fix For: 3.0.0-alpha2
>
> Attachments: HDFS-11233-branch-2.001.patch, HDFS-11233.001.patch
>
>
> After HADOOP-12705, the Jackson version upgraded from 2.2.3 to 2.7.8. This
> lead many APIs which we are used in hadoop being deprecated. Since 2.5, these
> two APIs are deprecated: {{ObjectReader#readerFor(Class<?>
> type)}},{{ObjectWriter#writerWithType(JavaType
> rootType)}}(http://fasterxml.github.io/jackson-databind/javadoc/2.6/com/fasterxml/jackson/databind/ObjectMapper.html).
> According to the doc of ObjectMapper, we can use
> {{ObjectReader#readerFor(Class<?> type)}} and
> {{ObjectWriter#writerFor(JavaType)}} instead.
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