log4net to SQLServer : what happens if database is unavailable?

Question

I have a log4net ado appender writing to a SQL Server database. I like it, I think it\'s neat. Before I send it into production, I want to know what the behaviour will be if

Answer 1

If in .Net 4.5.1 or later you will also have to set ConnectRetryCount=0; in your connection string.

Appender Configuration:

If you do Async logging like Log4Net.Async then Connect Timeout may be left at default 15 seconds.

Details

.Net 4.5.1 adds ADO.NET connection resiliency which tells Log4Net the connection is still open even though it isn't and attempts to reconnect using ConnectRetryCount. However since we want to let Log4Net do the reconnecting and ConnectRetryCount has a max of 255 we should set ConnectRetryCount to 0. Source: https://issues.apache.org/jira/browse/LOG4NET-442 https://blogs.msdn.microsoft.com/dotnet/2013/06/26/announcing-the-net-framework-4-5-1-preview/