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Posted to jira@kafka.apache.org by "Boyang Chen (Jira)" <ji...@apache.org> on 2020/05/13 01:30:00 UTC

[jira] [Created] (KAFKA-9984) Should fail the subscription when pattern is empty

Boyang Chen created KAFKA-9984:
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             Summary: Should fail the subscription when pattern is empty
                 Key: KAFKA-9984
                 URL: https://issues.apache.org/jira/browse/KAFKA-9984
             Project: Kafka
          Issue Type: Bug
          Components: consumer, streams
            Reporter: Boyang Chen


We have seen a case where the consumer subscribes to an empty string pattern:
```

[Consumer ...  ] Subscribed to pattern:  ''

```

which doesn't make any sense and usually indicate a configuration error. The `consumer.subscribe(pattern)` call should fail with illegal argument for this case.



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