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From "Micah Whitacre (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-609) KafkaSource could skip data with slow broker response
Date Tue, 28 Jun 2016 18:35:57 GMT
Micah Whitacre created CRUNCH-609:
-------------------------------------

             Summary: KafkaSource could skip data with slow broker response
                 Key: CRUNCH-609
                 URL: https://issues.apache.org/jira/browse/CRUNCH-609
             Project: Crunch
          Issue Type: Bug
          Components: IO
            Reporter: Micah Whitacre
            Assignee: Micah Whitacre


In the case of the consumer.poll timing out, the KafkaRecordReader could return with no values
in the records iterator which then causes the KafkaRecordReader to exit prematurely[1].  To
fix this we need to probably better track the start/end offset and that progress vs the null
value.

Additionally if we wanted to be smarter we could do some "backoff" for the timeout or just
have consumer specify a larger value.

[1] - https://github.com/apache/crunch/blob/360d72a4f887505e020fdb8f99c3ccb1800693f6/crunch-kafka/src/main/java/org/apache/crunch/kafka/inputformat/KafkaRecordReader.java#L122



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