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https://issues.apache.org/jira/browse/FLINK-1532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14319966#comment-14319966
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Stephan Ewen commented on FLINK-1532:
-------------------------------------

There is a random element in the program that generates keys for the solution 
set. Since the solution set is unique, a key collision may result in one record 
being dropped. That seemed to have been the case here.

I'll make a fix by introducing a deterministic "random" where we can be sure 
that no key collisions happen.

> AggregatorsITCase fails spuriously
> ----------------------------------
>
>                 Key: FLINK-1532
>                 URL: https://issues.apache.org/jira/browse/FLINK-1532
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Till Rohrmann
>
> Locally the AggregatorITCase failed with the following reason. I cannot 
> reproduce the failure constantly.
> {code}
> Failed tests:
>   
> AggregatorsITCase.after:75->TestBaseUtils.compareResultsByLinesInMemory:223->TestBaseUtils.compareResultsByLinesInMemory:237
>  Different number of lines in expected and obtained result. expected:<15> but 
> was:<14>
> {code}



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