[jira] [Created] (FLINK-4514) ExpiredIteratorException in Kinesis Consumer on long catch-ups to head of stream

[Shang Yuanchun (Jira)]

Tzu-Li (Gordon) Tai created FLINK-4514:
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             Summary: ExpiredIteratorException in Kinesis Consumer on long catch-ups to head of stream
                 Key: FLINK-4514
                 URL: https://issues.apache.org/jira/browse/FLINK-4514
             Project: Flink
          Issue Type: Bug
          Components: Kinesis Connector
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai
             Fix For: 1.2.0, 1.1.2


Original mailing thread for the reported issue:
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Kinesis-connector-Iterator-expired-exception-td8711.html

Normally, the exception is thrown when the consumer uses the same shard iterator after 5 minutes since it was retrieved. I've still yet to clarify & reproduce the root cause of the {{ExpiredIteratorException}}, because from the code it seems to be impossible. I'm leaning towards suspecting this is a Kinesis-side issue (from the description in the ML, the behaviour also seems indeterminate).

Either way, the exception can be fairly easily handled so that the consumer doesn't just fail. When caught, we request a new shard iterator from Kinesis with the last sequence number.



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