jonvex opened a new pull request, #10858:
URL: https://github.com/apache/hudi/pull/10858

   ### Change Logs
   
   In a couple cases, the target schema for the input batch does not go through 
deduceSchema. It is important that every schema goes through there before 
attempting the write.
   
   MOR read fails with empty schema. Ensure that schema is evaluated for all 
hudi relations, so that we can detect empty schema and send an empty rdd.
   
   
   ### Impact
   
   Reduce deltastreamer failure conditions. Reduce MOR read failure conditions.
   
   ### Risk level (write none, low medium or high below)
   
   low
   
   ### Documentation Update
   
   N/A
   
   ### Contributor's checklist
   
   - [ ] Read through [contributor's 
guide](https://hudi.apache.org/contribute/how-to-contribute)
   - [ ] Change Logs and Impact were stated clearly
   - [ ] Adequate tests were added if applicable
   - [ ] CI passed
   


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