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IT Nursery > News > log4j

log4j

Java, Programming
IT Nursery

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 ...
  • June 1, 2022
  • 0 Comments
logging, Programming
IT Nursery

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 ...
  • May 30, 2022
  • 0 Comments
apache-spark, Programming
IT Nursery

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 ...
  • May 29, 2022
  • 0 Comments

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 ...
  • May 25, 2022
  • 0 Comments

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 ...
  • May 16, 2022
  • 0 Comments

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 ...
  • May 6, 2022
  • 0 Comments

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 ...
  • April 7, 2022
  • 0 Comments

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 ...
  • April 7, 2022
  • 0 Comments

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 ...
  • April 7, 2022
  • 0 Comments

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 ...
  • April 7, 2022
  • 0 Comments

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