Welcome to Microsoft Q&A and thanks for reaching out.
The error message you received indicates that there was an issue with the pipeline when trying to copy data from SQL Server to Data Lake Storage Gen2 in Parquet format. However, the pipeline runs successfully when the sink format is set to CSV.
One possible reason for this issue could be that the Parquet format is not supported by the SHIR (Self-hosted Integration Runtime) version you are using. Please check the version of SHIR you are using and ensure that it supports Parquet format.
Another possible reason could be that the Parquet format is not compatible with the data you are trying to copy. Please ensure that the data you are trying to copy is compatible with the Parquet format.
To troubleshoot this issue, you can check the following:
- Check the SHIR version you are using and ensure that it supports Parquet format.
- Check the compatibility of the data you are trying to copy with the Parquet format.
- Check the pipeline settings and ensure that they are configured correctly.
You can also refer: How to copy data to and from Azure Data Lake Storage Gen2 using Azure Data Factory
I hope this helps! Let me know if you have any further questions.