Snowflake JDBC Driver v3.13.25 Behavior Change and SNOWFLAKE_11 Error

  • 30 October 2023
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Error: If your Snowflake account name contains underscores and you're using Snowflake JDBC driver version 3.13.25 or higher, you might encounter the following error message:

SNOWFLAKE_11 error. This error message indicates a communication problem with the message: "JDBC driver encountered a communication error. Message: Exception encountered for HTTP request: Name or service not known."

Solution: To prevent this error, explicitly set allowUnderscoresInHost to 'true' in your JDBC connection string or properties. Refer to the Snowflake Community article for additional guidance.

Affected Environments: This issue impacts environments meeting the following criteria:

  1. Snowflake account name contains underscores.
  2. JDBC is used for private link connections via the 'classic' regioned URL (e.g.,
  3. Upgrading Snowflake JDBC driver from version 3.13.24 or lower to 3.13.25 or higher.

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