microsoft
Java log4j2: Log messages go missing sporadically, especially in multi-threaded scenarios
Expected behavior
All log messages should be sent to App Insights
Actual behavior
Log messages go missing sporadically in multi-threaded scenarios when several threads are logging simultaneously Application Insights log file has no errors
To Reproduce
Clone https://github.com/hexagon-ecosys/azure-app-insights.git and run it several times by supplying the single parameter value '3' (which runs it in multi-threaded mode with long messages upto 20K characters in length)
System information
- App Insights 3.4.18
- MacOS 14.2 and Alpine 3.18 with Eclipse Temurin JDK 21
Additional Information
- I cannot not see any pattern to this issue other than the fact that it happens more during weekdays (we're based in New York City) and less during the weekends
- I am using the preview option generalExportQueueCapacity. Without it, I can see error messages in the Application Insights log file asking that it be set
I'm experiencing something very similar where there are portions of log messages missing from the same logger output executed at different time and we are also using log4j2 and there also seems to be no obvious pattern (using version 3.4.19 integrated with JVM argument).
