Result Download Worker Error Worker Error Microsoft Snowflake [updated] Instant

Run the command SELECT SYSTEM$ALLOWLIST(); in your Snowflake worksheet. Ensure all hostnames and ports listed—especially those related to STAGE —are added to your firewall’s allowed list. 2. SSL/TLS Handshake Failures

When you run a small query, Snowflake often sends the result back directly over the main connection. However, for larger datasets, Snowflake stores the results in an internal "stage" (on if your Snowflake account is hosted on Azure). The client then initializes a separate background worker to download these "chunks" of data. Run the command SELECT SYSTEM$ALLOWLIST(); in your Snowflake

Sometimes the worker fails with a CURLerror (curl_easy_perform() failed) - code=35 or "SSL connect error". SSL/TLS Handshake Failures When you run a small

... osMsg='Unknown error' Verify that the hostnames and portnumbers in SYSTEM$ALLOWLIST are added to your firewall's allowed list. Snowflake Error SSL Certificate - Alteryx Community for larger datasets

The downloader needs to connect to an Azure Blob Storage URL (e.g., *.blob.core.windows.net ). If this isn't on your whitelist, the worker fails.

Configure your proxy to bypass SSL inspection for the Snowflake and Azure storage endpoints. Additionally, ensure you are using the latest Snowflake ODBC driver version, as older versions may have outdated certificate bundles. 3. Power BI Service vs. Desktop Discrepancies Arrow chunk download failed max retries done

The error "Result download worker error: Worker error" occurs when this background worker cannot reach the storage endpoint or fails its security handshake. Common Root Causes & Solutions 1. Firewall and Proxy Obstructions