Yuri Makhno created FLINK-4616: ---------------------------------- Summary: Kafka consumer doesn't store last emmited watermarks per partition in state Key: FLINK-4616 URL: https://issues.apache.org/jira/browse/FLINK-4616 Project: Flink Issue Type: Bug Components: Kafka Connector Affects Versions: 1.1.1 Reporter: Yuri Makhno Fix For: 1.2.0, 1.1.3
Kafka consumers stores in state only kafka offsets and doesn't store last emmited watermarks, this may go to wrong state when checkpoint is restored: Let's say our watermark is (timestamp - 10) and in case we have the following messages queue results will be different after checkpoint restore and during normal processing: A(ts = 30) B(ts = 35) ------ checkpoint goes here C(ts=15) -- this one should be filtered by next time window D(ts=60) -- This message was sent by Atlassian JIRA (v6.3.4#6332)