Configuring Log4j Loggers Programmatically
I am trying to use SLF4J (with log4j binding) for the first time. I would like to configure 3 different named Loggers that … Read more
log4j
log4j logging hierarchy order
What is the hierarchy of log4j logging? DEBUG INFO WARN ERROR FATAL Which one provides the highest logging which would be helpful to … Read more
How to stop INFO messages displaying on spark console?
I’d like to stop various messages that are coming on spark shell. I tried to edit the log4j.properties file in order to stop … Read more
In log4j, does checking isDebugEnabled before logging improve performance?
I am using Log4J in my application for logging. Previously I was using debug call like: Option 1: logger.debug(“some debug text”); but some … Read more
How to initialize log4j properly?
After adding log4j to my application I get the following output every time I execute my application: log4j:WARN No appenders could be found … Read more
No appenders could be found for logger(log4j)?
I have put log4j to my buildpath, but I get the following message when I run my application: log4j:WARN No appenders could be … Read more
Please initialize the log4j system properly. While running web service
Those messages are something tricky, enough so that people created this to make it clearer: https://issues.apache.org/bugzilla/show_bug.cgi?id=25747 What’s tricky about them is that the warnings … Read more
Please initialize the log4j system properly warning
Alright, so I got it working by changing this log4j.rootLogger=DebugAppender to this log4j.rootLogger=DEBUG, DebugAppender Apparently you have to specify the logging level to … Read more
What is the result of making log4j additivity equals to true or false?
By default, a logger inherits the appenders from its ancestors. By setting additivity=”false”, you prevent this behaviour. In your example, there may be appenders … Read more
Difference between slf4j-log4j12 and log4j-over-slf4j
Use this if your code or some libraries you are using uses Log4j directly, but you want to use a different SLF4J binding than … Read more