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https://issues.apache.org/jira/browse/KAFKA-14314?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mickael Maison resolved KAFKA-14314.
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Fix Version/s: 3.4.0
Resolution: Fixed
> MirrorSourceConnector throwing NPE during `isCycle` check
> ---------------------------------------------------------
>
> Key: KAFKA-14314
> URL: https://issues.apache.org/jira/browse/KAFKA-14314
> Project: Kafka
> Issue Type: Bug
> Components: mirrormaker
> Affects Versions: 3.3.1
> Reporter: John Krupka
> Assignee: John Krupka
> Priority: Blocker
> Fix For: 3.4.0
>
>
> We are using MirrorMaker to replicate topics across clusters in AWS. As the
> process is starting up, we are getting a NullPointerException when
> MirrorSourceConnector is calling `isCycle`.
> Retrieving the `upstreamTopic` on [this line of
> code|https://github.com/apache/kafka/blob/cc582897bfb237572131369a598f7869220b43dc/connect/mirror/src/main/java/org/apache/kafka/connect/mirror/MirrorSourceConnector.java#L497]
> is returning null, which causes the NPE on the next line.
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