Badai Aqrandista created KAFKA-6756:
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Summary: client.id and group.id validation in the old vs new
consumer
Key: KAFKA-6756
URL: https://issues.apache.org/jira/browse/KAFKA-6756
Project: Kafka
Issue Type: Bug
Components: clients
Affects Versions: 1.1.0, 0.10.2.1
Reporter: Badai Aqrandista
It looks like the old consumer that is based on the Scala code validates
"client.id" and "group.id" using this code:
[https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/common/Config.scala#L25]
[https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/consumer/ConsumerConfig.scala#L60]
However, the new consumer uses the Java code that does not validate "client.id"
and "group.id" at all here:
[https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/ConsumerConfig.java#L264]
[https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/clients/consumer/ConsumerConfig.java#L298]
So the new consumer does not validate "client.id" and "group.id" like the old
consumer. Either way, the documentation never specify the valid character for
"client.id" and "group.id".
Is this a bug or by design?
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