Frederic Arno created KAFKA-6323:
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Summary: punctuate with WALL_CLOCK_TIME triggered immediately
Key: KAFKA-6323
URL: https://issues.apache.org/jira/browse/KAFKA-6323
Project: Kafka
Issue Type: Bug
Components: streams
Affects Versions: 1.0.0
Reporter: Frederic Arno
Fix For: 1.0.1
When working on a custom Processor from which I am scheduling a punctuation
using WALL_CLOCK_TIME. I've noticed that whatever the punctuation interval I
set, a call to my Punctuator is always triggered immediately.
Having a quick look at kafka-streams' code, I could find that all
PunctuationSchedule's timestamps are matched against the current time in order
to decide whether or not to trigger the punctuator
(org.apache.kafka.streams.processor.internals.PunctuationQueue#mayPunctuate).
However, I've only seen code that initializes PunctuationSchedule's timestamp
to 0, which I guess is what is causing an immediate punctuation.
At least when using WALL_CLOCK_TIME, shouldn't the PunctuationSchedule's
timestamp be initialized to current time + interval?
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