Symptoms

Consider that Internet Protocol Version 6 (IPv6) is disabled on startup for SQL Server 2017 on Linux. Therefore, any outbound connections that are initiated by SQL Server to connect to linked server or to secondaries of an availability group by hostname will fail with an error because of name resolution problems.

Workaround

Use Internet Protocol (IP) address instead of hostname to connect to SQL Server or remove the parameter ipv6.disable=1 in boot cmdline file to enable IPv6.

Resolution

This issue is fixed in the following cumulative update for SQL Server:

       Cumulative Update 2 for SQL Server 2017

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:

Latest cumulative update for SQL Server 2017

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminologythat Microsoft uses to describe software updates.

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