State commit / cleanup#9
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Guozhang Wang (guozhangwang) wants to merge 7 commits into
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Why did you move these trivial variable initializations to constructor?
Is it the recommended Kafka coding style? Just wondering.
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Not really kafka conventions but just personal coding style.
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Is there an issue for moving tirivial initialization to constructor?
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ymatsuda
Task state commit can happen either when user called context.commit() during the processing of a record in any processor, or when the commit interval has reached. In the first case, the task will commit it state including local state store, consumed offset and produced record; in the latter case, the thread will just commit the states of all tasks it owns.
Did not have the threshold on total #. buffered records across tasks, since after chatting to Jason Gustafson (@hachikuji) I feel poll(0)'s overhead is very minimal, and asking users to specify the threshold could be hard since there is already a config for per-partition max buffered records.
Some minor fixes on metrics recording, state cleanup, etc.