John Krupka created KAFKA-14314:
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Summary: 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
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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