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https://issues.apache.org/jira/browse/BEAM-7658?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17547993#comment-17547993
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Danny McCormick commented on BEAM-7658:
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This issue has been migrated to https://github.com/apache/beam/issues/19649
> Synthetic unbounded source looses (duplicates?) data while splitting
> --------------------------------------------------------------------
>
> Key: BEAM-7658
> URL: https://issues.apache.org/jira/browse/BEAM-7658
> Project: Beam
> Issue Type: Bug
> Components: testing
> Reporter: Lukasz Gajowy
> Priority: P3
>
> This came out while creating KafkaIOIT ingesting data generated using
> SyntheticUnboundedSource. Hashcode of data created by
> {code:java}
> .apply("Calculate hashcode", Combine.globally(new
> HashingFn()).withoutDefaults()){code}
> was different for 1000 records every time. When a number of splits was set to
> 1 the problem disappeared (sourceOptions.forceNumInitialBundles).
>
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