dave-csc commented on issue #6069:
URL: https://github.com/apache/hop/issues/6069#issuecomment-3575285863
Update here... I can confirm with a sample case that something has broken
between 2.15 and 2.16.
Need these files to test (place all the files in the `${PROJECT_HOME}`
folder and change the `.hpl.txt` extension with just `.hpl`):
-
[_test_merge_rows_injection.hpl.txt](https://github.com/user-attachments/files/23745859/_test_merge_rows_injection.hpl.txt):
the "main" or "injecting" pipeline
-
[_inj-merge-rows.hpl.txt](https://github.com/user-attachments/files/23745882/_inj-merge-rows.hpl.txt):
the "injected" pipeline
-
[sample1.txt](https://github.com/user-attachments/files/23745891/sample1.txt)
and
[sample2.txt](https://github.com/user-attachments/files/23745893/sample2.txt):
sample data with 30 rows each, 10 are identical, 10 are changed, 10 are
new/deleted
When executing the main pipeline in Hop 2.15, the expected output is
returned
([sample_compare_2.15.txt](https://github.com/user-attachments/files/23745962/sample_compare_2.15.txt)).
In Hop 2.16, instead, without changes in the main pipeline all the rows are
considered identical
([sample_compare_2.16.txt](https://github.com/user-attachments/files/23745986/sample_compare_2.16.txt)).
I also tried to remove the missing mappings, and then move the key and value
field in the new rows (see
[_test_merge_rows_injection_update.hpl.txt](https://github.com/user-attachments/files/23746019/_test_merge_rows_injection_update.hpl.txt)),
but I got the following error when executing the pipeline:
```
2025/11/25 12:35:09 - ETL metadata injection.0 - ERROR: Unexpected error
2025/11/25 12:35:09 - ETL metadata injection.0 - ERROR:
org.apache.hop.core.exception.HopException:
2025/11/25 12:35:09 - ETL metadata injection.0 - Error inject property
'KEY_FIELD' into class
org.apache.hop.pipeline.transforms.mergerows.MergeRowsMeta
2025/11/25 12:35:09 - ETL metadata injection.0 - Cannot invoke
"org.apache.hop.core.RowMetaAndData.getString(String, String)" because "data"
is null
2025/11/25 12:35:09 - ETL metadata injection.0 -
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.core.injection.bean.BeanInjector.setProperty(BeanInjector.java:198)
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.pipeline.transforms.metainject.MetaInject.newInjectionConstants(MetaInject.java:486)
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.pipeline.transforms.metainject.MetaInject.processRow(MetaInject.java:135)
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:54)
2025/11/25 12:35:09 - ETL metadata injection.0 - at
java.base/java.lang.Thread.run(Thread.java:833)
2025/11/25 12:35:09 - ETL metadata injection.0 - Caused by:
java.lang.NullPointerException: Cannot invoke
"org.apache.hop.core.RowMetaAndData.getString(String, String)" because "data"
is null
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.core.injection.bean.BeanInjector.setProperty(BeanInjector.java:261)
2025/11/25 12:35:09 - ETL metadata injection.0 - at
org.apache.hop.core.injection.bean.BeanInjector.setProperty(BeanInjector.java:190)
2025/11/25 12:35:09 - ETL metadata injection.0 - ... 4 more
2025/11/25 12:35:09 - ETL metadata injection.0 - Finished processing (I=0,
O=0, R=6, W=0, U=0, E=1)
```
Hope this helps for the resolution :)
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