Github user uce commented on a diff in the pull request:
https://github.com/apache/flink/pull/2583#discussion_r82173079
--- Diff:
flink-streaming-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBase.java
---
@@ -127,12 +125,7 @@
*/
public FlinkKafkaConsumerBase(List<String> topics,
KeyedDeserializationSchema<T> deserializer) {
this.topics = checkNotNull(topics);
- checkArgument(topics.size() > 0, "You have to define at least
one topic.");
--- End diff --
+1 to pass a dummy list if possible
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