How Thread-Safe is NLog?

Question

Well,

I have waited for days before deciding to post this issue, as I was not sure how to state this, resutling into a long detailed post. However, I think it is re

Answer 1

This is an older question, but as current owner of NLog I have the following insights:

• Creating a logger is thread-safe
• Writing log messages is thread-safe
• Usage of the context classes and renderers are (GDC, MDC etc) thread-safe
• Adding new targets + rules at runtime is thread-safe (When using LoggingConfiguration.AddRule + ReconfigExistingLoggers)
• Performing Reload of LoggingConfiguration will cause LogEvents from active loggers to be dropped until reload has completed.
• Changing values of existing rules and targets at run-time isn't thread-safe!

You should avoid changing the values of existing items at runtime. Instead one should use the context renderers (${event-properties}, ${GDC}, ${MDLC}, etc.)