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From "Tzu-Li (Gordon) Tai (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-7195) FlinkKafkaConsumer should not respect fetched partitions to filter restored partition states
Date Fri, 14 Jul 2017 11:45:00 GMT
Tzu-Li (Gordon) Tai created FLINK-7195:
------------------------------------------

             Summary: FlinkKafkaConsumer should not respect fetched partitions to filter restored
partition states
                 Key: FLINK-7195
                 URL: https://issues.apache.org/jira/browse/FLINK-7195
             Project: Flink
          Issue Type: Bug
          Components: Kafka Connector
    Affects Versions: 1.3.1
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai
            Priority: Blocker
             Fix For: 1.3.2


This issue is a re-appearance of FLINK-6006. On restore, we should not respect any fetched
partitions list from Kafka and perform any filtering of the restored partition states. There
are corner cases where, due to Kafka broker downtime, some partitions may be missing in the
fetched partition list. To be more precise, we actually should not require fetching partitions
on restore.

We've stepped on our own foot again and reintroduced this bug in https://github.com/apache/flink/pull/3378/commits/ed68fedbe90db03823d75a020510ad3c344fa73e.
The previous test for this behavior was too implementation specific, and therefore the leak
in catching this on different internal implementations.
We should have a proper unit test for this that does not rely on the internal implementations
and test only on public abstractions of {{FlinkKafkaConsumerBase}}.



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