Henry Cai created KAFKA-3596:
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Summary: Kafka Streams: Window expiration needs to consider more
than event time
Key: KAFKA-3596
URL: https://issues.apache.org/jira/browse/KAFKA-3596
Project: Kafka
Issue Type: Improvement
Components: streams
Affects Versions: 0.10.1.0
Reporter: Henry Cai
Assignee: Guozhang Wang
Priority: Minor
Currently state store replication always go through a compact kafka topic. For
some state stores, e.g. JoinWindow, there are no duplicates in the store, there
is not much benefit using a compacted topic.
The problem of using compacted topic is the records can stay in kafka broker
forever. In my use case, my key is ad_id, it's incrementing all the time, not
bounded, I am worried the disk space on broker for that topic will go forever.
I think we either need the capability to purge the compacted records on broker,
or allow us to specify different compact option for state store replication.
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