Dataflows Refreshment is not working multiple failure log

Hey  Anonymous ,

Thank you for sharing the details and confirming that the dataflows are running on Gen1. Based on the error logs and your setup, here are some additional considerations:

1) Gateway & Gen1 Limitations

• Gen1 dataflows rely heavily on the gateway for refresh orchestration. If multiple refreshes overlap, gateway resource contention can cause intermittent failures.
• Ensure the gateway is updated to the latest version and check logs for spikes during refresh windows.

Power BI DataGateway for AWS Redshift 

2) Consider Migrating to Dataflows Gen2

• Gen2 offers:
• Improved retry logic for transient errors.
• Better resource isolation and parallel refresh handling.
• Enhanced monitoring and diagnostics.
• Migration can significantly reduce failures caused by gateway bottlenecks.

Understand and optimize dataflows refresh

Troubleshoot Refresh Scenarios – Power BI

3) Timeout & Connection Settings

• Increase ODBC command timeout in Power Query M code:

Sql.Database("server", "database", [CommandTimeout = #duration(0, 0, 30, 0)])

• This helps avoid failures during long-running queries.

Dataflow Timeout

4) Redshift Optimization

• Enable KeepAlive or persistent connections in ODBC settings.
• Use materialized views or pre-aggregated tables for heavy queries.
• Monitor WLM queues for query performance during refresh windows.

Connect Redshift to Power BI: A Comprehensive Guide

5) Retry & Scheduling

• Gen1 does not have robust retry logic, so consider using Power Automate to trigger retries for failed refreshes.
• Add buffer time between refreshes to reduce gateway contention.

Power BI Dataflow Refresh: A Comprehensive Guide

6) Address ODBC HY000 Errors

• These errors often indicate transient network issues or IAM misconfigurations.
• Verify:
• Latest Amazon Redshift ODBC driver installed.
• Correct IAM profile and permissions.
• Network stability between gateway and Redshift cluster.

Using an Amazon Redshift ODBC driver on Microsoft Windows

AWS Blog – Integrate Power BI with Redshift

Best Regards,
Nasif Azam