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https://issues.apache.org/jira/browse/FLINK-6805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033571#comment-16033571
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Shannon Carey commented on FLINK-6805:
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A better solution may be to add exclusions for the Netty libraries in the
flink-connector-cassandra POM, then the other changes wouldn't necessarily be
required (although they might still be desirable).
> Flink Cassandra connector dependency on Netty disagrees with Flink
> ------------------------------------------------------------------
>
> Key: FLINK-6805
> URL: https://issues.apache.org/jira/browse/FLINK-6805
> Project: Flink
> Issue Type: Bug
> Components: Cassandra Connector
> Affects Versions: 1.3.0, 1.2.1
> Reporter: Shannon Carey
>
> The Flink Cassandra connector has a dependency on Netty libraries (via
> promotion of transitive dependencies by the Maven shade plugin) at version
> 4.0.33.Final, which disagrees with the version included in Flink of
> 4.0.27.Final which is included & managed by the parent POM via dependency on
> netty-all.
> Due to use of netty-all, the dependency management doesn't take effect on the
> individual libraries such as netty-handler, netty-codec, etc.
> I suggest that dependency management of Netty should be added for all Netty
> libraries individually (netty-handler, etc.) so that all Flink modules use
> the same version, and similarly I suggest that exclusions be added to the
> quickstart example POM for the individual Netty libraries so that fat JARs
> don't include conflicting versions of Netty.
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