HTHou opened a new pull request, #17122:
URL: https://github.com/apache/iotdb/pull/17122

   This pull request introduces an additional test case to ensure correct 
deletion behavior after a failed insert, and improves the logic in the data 
region write path to avoid unnecessary file processor creation when all 
measurements in a row have failed.
   
   **Testing improvements:**
   
   * Added a new test `testDeleteDataAfterInsertFailed` in 
`IoTDBDeletionIT.java` to verify that data can be deleted successfully even 
after an insert operation fails due to invalid data, and to confirm that no 
residual data remains after the deletion.
   
   **Write path robustness:**
   
   * Updated `insertToTsFileProcessor` in `DataRegion.java` to immediately 
return `null` if all measurements in an `InsertRowNode` have failed, preventing 
unnecessary creation or retrieval of a `TsFileProcessor` in such cases.


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