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https://issues.apache.org/jira/browse/HUDI-2496?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Raymond Xu reassigned HUDI-2496:
--------------------------------
Assignee: Helias Antoniou
> Inserts are precombined even with dedup disabled
> ------------------------------------------------
>
> Key: HUDI-2496
> URL: https://issues.apache.org/jira/browse/HUDI-2496
> Project: Apache Hudi
> Issue Type: Bug
> Components: Writer Core
> Reporter: Sagar Sumit
> Assignee: Helias Antoniou
> Priority: Critical
> Labels: sev:critical
> Fix For: 0.10.0
>
>
> Original GH issue https://github.com/apache/hudi/issues/3709
> Test case by [~xushiyan] : [https://github.com/apache/hudi/pull/3723/files]
> RCA by [~shivnarayan] :
> Within HoodieMergeHandle, we use a hashmap to store incoming records, where
> keys are record keys.
> and so, if you see 1st batch, duplicates would remain intact. but wrt 2nd
> batch, only unique records are considered and later concatenated w/ 1st batch.
>
> [https://github.com/apache/hudi/blob/36be28712196ff4427c41b0aa885c7fcd7356d7f/hudi-[]…]-common/src/main/java/org/apache/hudi/io/HoodieMergeHandle.java
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