Why I am getting error "ERROR Could not find value for key log4j.appender.CONSOLE"?

Question

I am using a log4j version 1.2.15, at the time of executing a code I am able to get log file and .html but in console it generate a below error:

log4j:ERROR Could not find value for key log4j.appender.CONSOLE
log4j:ERROR Could not instantiate appender named "CONSOLE".

I am using below property file:

log4j.rootLogger= INFO,CONSOLE,R,HTML,TTCC

//Here we define the appender
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.TTCC=org.apache.log4j.RollingFileAppender
log4j.appender.HTML=org.apache.log4j.FileAppender

// Here we define log file location
log4j.appender.R.File=./log/testlog.log
log4j.appender.TTCC.File=./log/testlog.log
log4j.appender.HTML.File=./log/aplication.html

// Here we define the layout and pattern
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern= [%t:%p] %c: %m%n

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern= %d - %c -%p -%m%n

log4j.appender.TTCC.layout=org.apache.log4j.TTCCLayout
log4j.appender.TTCC.layout.DateFormat=ISO8601

log4j.appender.HTML.layout=org.apache.log4j.HTMLLayout
log4j.appender.HTML.layout.Title=Application log
log4j.appender.HTML.layout.LocationInfo= true

Also, I don't understand in log file why it print same line twice with "main" and "demo", please check below:

015-08-10 21:25:08,921 - demo -INFO -New driver instantiated
2015-08-10 21:25:08,921 [main] INFO demo - New driver instantiated
2015-08-10 21:25:09,000 - demo -INFO -Implicit wait applied on the driver for 10 seconds
2015-08-10 21:25:09,000 [main] INFO demo - Implicit wait applied on the driver for 10 seconds
2015-08-10 21:25:42,156 - demo -INFO -Web application launched
2015-08-10 21:25:42,156 [main] INFO demo - Web application launched

Can anyone please let me know what the exact problem is? Also, I am trying it first time by seeing the tutorial. So, please help me.

Answer 1

Your root logger definition says CONSOLE (all caps). But you are initiating log4j.appender for console(smaller case).

As per log4j documentation

Logger names are case-sensitive

Change the line

log4j.rootLogger= INFO,CONSOLE,R,HTML,TTCC

to

log4j.rootLogger= INFO,console,R,HTML,TTCC

in order for log4j to initialize properly.