Symptoms
Assume that you use an AlwaysOn Availability Group in an instance of SQL Server 2017 on Linux. Although you configure the failure condition level to Failover or restart on critical server errors, a server restart or failover might be triggered even when the "query_processing error" is returned.
Resolution
This issue is fixed in the following cumulative update for SQL Server:
Cumulative Update 3 for SQL Server 2017
About cumulative updates for SQL Server:
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 terminology that Microsoft uses to describe software updates.