[Bug]: Parquet Input fails if there are no files on input

[mattcasters]

Apache Hop version?

2.11.0

Java version?

openjdk 17.0.13 2024-10-15 LTS

Operating system

Linux

What happened?

Just provide 0 file rows as input for the Parquet Input transform and you get this error:

2024/12/18 10:07:55 - Read a parquet.5 - ERROR: Unexpected error
2024/12/18 10:07:55 - Read a parquet.5 - ERROR: java.lang.NullPointerException: Cannot invoke "org.apache.parquet.hadoop.ParquetReader.close()" because "this.data.reader" is null
2024/12/18 10:07:55 - Read a parquet.5 - 	at org.apache.hop.parquet.transforms.input.ParquetInput.closeFile(ParquetInput.java:107)
2024/12/18 10:07:55 - Read a parquet.5 - 	at org.apache.hop.parquet.transforms.input.ParquetInput.processRow(ParquetInput.java:50)
2024/12/18 10:07:55 - Read a parquet.5 - 	at org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:54)
2024/12/18 10:07:55 - Read a parquet.5 - 	at java.base/java.lang.Thread.run(Thread.java:840)

Issue Priority

Priority: 3

Issue Component

Component: Transforms