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https://issues.apache.org/jira/browse/CASSANDRA-16854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17408444#comment-17408444
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Tatu Saloranta commented on CASSANDRA-16854:
--------------------------------------------
Thank you [~mck]!
> Exclude Jackson 1.x dependency that leaks via old hadoop-core dependency
> ------------------------------------------------------------------------
>
> Key: CASSANDRA-16854
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16854
> Project: Cassandra
> Issue Type: Improvement
> Components: Dependencies
> Reporter: Tatu Saloranta
> Assignee: Tatu Saloranta
> Priority: Normal
> Fix For: 3.11.12, 4.1, 4.0.2
>
> Attachments: CASSANDRA-16854.patch
>
>
> build.xml has a dependency for an old hadoop-core version (1.0.3). This is
> likely needed for some Hadoop compatibility code under
> `src/java/org/apache/cassandra/hadoop`. Since 1.0.3 was released in 2012, its
> dependencies are very old; in particular it depends on "jackson-mapper-asl"
> 1.0.1 (from 2009!).
> An earlier issue CASSANDRA-15867 referenced this dependency as well (but did
> not actually remove it for some reason, which marked as resolved).
> Although `hadoop-core` dependency is marked as "provided" (and should then
> not be included in distributed version) it seems best to avoid downloading it
> during build to "build/lib/jars". This can be done by adding 2 exclusions for
> "hadoop-core" and "hadoop-minicluster" dependencies in build.xml.
> I will provide a patch.
> I also tried updating "hadoop-core" to the latest public version (1.2.1),
> which would have upgraded jackson-mapper-asl to 1.8.8, but that breaks the
> build due to some other version incompatibility (asm, possibly). If anyone
> wants to tackle that issue it could be a good follow-up task; "hadoop-core"
> itself has been moved to "hadoop-client" it seems (and there's
> "hadoop-commons" too... confusing).
>
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