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Low severitydata sourceAzure Data Factory →

ADF Pipeline Error:
RestSinkUNSupportedCompressionType

What does this error mean?

The compression type configured for the ADF REST sink is not supported. REST sinks only accept uncompressed data — compression settings applicable to file-based connectors cannot be applied to REST.

Common causes

  • 1A compression setting (gzip, deflate, etc.) was applied to a REST sink dataset, which does not support compression
  • 2A dataset was reused across a file-based connector and a REST connector without removing the compression configuration

How to fix it

  1. 1Open the copy activity's sink dataset and remove the compression type setting.
  2. 2REST sink does not support compression — if compression is needed, compress the data in the source transformation before passing it to the REST sink.

Frequently asked questions

Does this error affect all pipeline runs or just the current one?

Depends on the root cause. A persistent misconfiguration fails every run; a transient issue may resolve on retry. Check the run history.

Can this error appear in Azure Data Factory and Microsoft Fabric pipelines?

Yes — the same connector errors appear in both ADF and Fabric Data Factory pipelines.

How do I see the full error detail for an ADF pipeline failure?

In ADF Monitor, click the failed run, then the failed activity. The detail pane shows the error code, message, and sub-error codes.

Will downstream Power BI datasets be affected when an ADF pipeline fails?

Yes — a dataset refreshing after the pipeline will use stale data or fail if the target table was cleared. The Power BI refresh may succeed while serving wrong data.

Source · learn.microsoft.com/en-us/azure/data-factory/connector-troubleshoot-rest

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