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Posted to dev@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2015/06/16 16:49:00 UTC
[jira] [Created] (FLINK-2234) CoStreamWindow is Dependent on Input
Ordering
Aljoscha Krettek created FLINK-2234:
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Summary: CoStreamWindow is Dependent on Input Ordering
Key: FLINK-2234
URL: https://issues.apache.org/jira/browse/FLINK-2234
Project: Flink
Issue Type: Improvement
Components: Streaming
Reporter: Aljoscha Krettek
Assignee: Aljoscha Krettek
The implementation depends on elements always arriving in a round-robin fashion, i.e. element from first input, then element from second input, then first again and so on (read order is 1,2,1,2...). I don't think this assumption holds for real-world problems.
For example, CoWindowTest produces wrong results if MockCoContext is modified to read two elements from input 1 and then one from two (read order 1,1,2,1,1,2...).
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