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https://issues.apache.org/jira/browse/HUDI-8521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17899568#comment-17899568
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Y Ethan Guo commented on HUDI-8521:
-----------------------------------

The test scenario is inserts followed by upserts (with both ordering field 
value larger or smaller) generating log files and compaction in MOR table.  
Check which record is in the table after compaction.  Run with 
OverwriteWithLatestAvroPayload specified in 0.x releases.  Run with two 
scenarios: (1) no precombine/ordering field specified, make sure there is no 
"ts" field in schema (2) specify precombine/ordering field.

> Resolve issues w/ diff merge modes 
> -----------------------------------
>
>                 Key: HUDI-8521
>                 URL: https://issues.apache.org/jira/browse/HUDI-8521
>             Project: Apache Hudi
>          Issue Type: Bug
>          Components: reader-core, writer-core
>            Reporter: sivabalan narayanan
>            Assignee: Lin Liu
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>
> we found some issues w/ merge mode feature in 1.x. 
> we need to triage them and fix 



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