Matthias created KAFKA-6273:
-------------------------------
Summary: Allow names for windowing joins
Key: KAFKA-6273
URL: https://issues.apache.org/jira/browse/KAFKA-6273
Project: Kafka
Issue Type: Improvement
Reporter: Matthias
Currently, the internal name of a windowing join is generated at runtime using
a counter to ensure uniqueness within a running topology.
If a topology is changed and redeployed, different names can be generated for
the same window. This can result in lost windowing state without intervention
modifying offsets to re-consume the input topics.
https://kafka.apache.org/10/javadoc/org/apache/kafka/streams/kstream/Joined.html
The proposed change would be to add an optional configuration parameter
"joinName" to Joined. If provided, this would be used by KStreamImpl to
generate internal names when building a join. If not provided the existing name
generation would be used. (Since this is an opt-in, optional parameter there
would be no impact on existing code.)
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
