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https://issues.apache.org/jira/browse/KAFKA-2897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15028961#comment-15028961
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Flavio Junqueira commented on KAFKA-2897:
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I'm not aware of backward incompatible changes in zkclient, but if you're
concerned about it, then we may need to check it.
> Class NIOServerCnxn$Factory not found due to mismatch in dependencies
> ---------------------------------------------------------------------
>
> Key: KAFKA-2897
> URL: https://issues.apache.org/jira/browse/KAFKA-2897
> Project: Kafka
> Issue Type: Bug
> Reporter: Yuval Steinbegr
> Priority: Trivial
>
> It seems that there is a mismatch between zookeeper & zkclient in kafka
> pom.xml causes this error upon initialization:
> The pom file (e.g. of kafka_2.10:0.8.2.1) requires zookeeper:3.4.6 &
> zkclient:0.3, However:
> * While zookeeper:3.3.x had a class NIOServerCnxn$Factory, in 3.4.x it became
> an independent class (NIOServerCnxnFactory)
> * ZkServer class of zkclient:0.3 is still using (importing)
> NIOServerCnxn.Factory and only in 0.5 changes to use NIOServerCnxnFactory.
> It seems that the version of zkclient in the pom file should be updated
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