Boyang Chen created KAFKA-9224:
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Summary: State store should not see uncommitted transaction result
Key: KAFKA-9224
URL: https://issues.apache.org/jira/browse/KAFKA-9224
Project: Kafka
Issue Type: Improvement
Reporter: Boyang Chen
Assignee: Boyang Chen
Currently under EOS, the write to state store is not guaranteed to happen after
the ongoing transaction is finished. This means interactive query could see
uncommitted data within state store which is not ideal for users relying on
state stores for strong consistency. Ideally, we should have an option to
include state store commit as part of ongoing transaction, however an immediate
step towards a better reasoned system is to `write after transaction commit`,
which means we always buffer data within stream cache for EOS until the ongoing
transaction is committed.
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