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log4j doesn't find appenders

Always I try to use a formal and structurized log api is a nightmare (this explains why so many people just print to console)
I'm trying to use log4j in my project
to instantiate the logger I do:
private static final Logger log = LoggerFactory.getLogger(Instagram.class.getPackage().getName());
when I want to register an event I do:
log.info("some information");
I've a log4j.properties file in the src folder like:
log4j.logger.com.tomatechines.instagramapi.api = INFO, CONSOLE, FILE, ERROR
log4j.rootLogger = INFO, FILE, ERROR
log4j.appender.FILE=org.apache.log4j.DailyRollingFileAppender
log4j.appender.FILE.DatePattern = yyyy-MM-dd'.log'
log4j.appender.FILE.File = logs/log-
log4j.appender.FILE.layout = org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%d{HH:mm:ss.SSS} %-5p %C{1}:%L - %m%n
log4j.appender.ERROR=org.apache.log4j.DailyRollingFileAppender
log4j.appender.ERROR.DatePattern = yyyy-MM-dd'.log'
log4j.appender.ERROR.File = logs/errorlog-
log4j.appender.ERROR.layout = org.apache.log4j.PatternLayout
log4j.appender.ERROR.layout.conversionPattern=%d{HH:mm:ss.SSS} %-5p %C{1}:%L - %m%n
log4j.appender.ERROR.Threshold=WARN
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.conversionPattern=%d{HH:mm:ss.SSS} %-5p %C{1}:%L - %m%n
but when the code runs the only thing printed to console or file is:
log4j:WARN No appenders could be found for logger (com.tomatechines.instagramapi.api).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
why it doesn't find my file, I set 3 appenders and why can't it find just one

First of all, I can see that you are using SLF4J with log4j 1.2.x, because you are instantiating the logger with LoggerFactory.getLogger. If you want to use only log4j 1.2.x you should get the logger with Logger.getLogger. Making sure that you have imported the classes from org.apache.log4j package.
You must also make sure that you have put the log4j.properties file under the classpath. And in my opinion you should try first with a very simple configuration, to avoid configuration problems. Something like:
# Root logger option
log4j.rootLogger=INFO, stdout
# Direct log messages to stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
Probably your problem is about the location of log4j.properties file.

All log4j appenders defined in log4j.properties in play

My log4j.properties file is pasted below. My understanding is that we need to add Appenders to the root logger for the appender to work. As you can see in the below properties file, only appender A is attached to the root logger (log4j.rootLogger=info, A). However, what I see is that the logging information is printed to both the appenders (ConsoleAppender - A and File Appender - B). How is this possible?
log4j.rootLogger=info, A
log4j.appender.A=org.apache.log4j.ConsoleAppender
log4j.appender.A.layout=org.apache.log4j.PatternLayout
log4j.appender.A.layout.ConversionPattern=%-4r [%t] [rid=%X{RID} ] %-5p %c %x - %m%n
log4j.appender.B=org.apache.log4j.FileAppender
log4j.appender.B.layout=org.apache.log4j.PatternLayout
log4j.appender.B.file=target/server.log
log4j.appender.B.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

Well, it turns out that the Console appender (A) was printing out to the server.log (glassfish log) which incidentally is also the name of the log file associated with appender B.
The following property was attached to the glassfish server (startup parameters) which helped me understand which log4j.properties (in case of stray properties file) file is loaded along with information like what appenders are used for logging.
-Dlog4j.debug=true

Log4j output on console instead of configured file

I configured Log4j to log into a file but it is instead logging to stdout.
it creates the log file but it does not write to it, instead to stdout.
Here is my config file:
log4j.rootCategory=INFO, file, mail
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.File=/path-to/jobs-batch.log
log4j.appender.file.MaxFileSize=10MB
log4j.appender.file.MaxBackupIndex=2
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[jobs-batch] %p [%t] %c{1}.%M(%L) | %m%n
log4j.logger.org.springframework.jdbc=WARN
# Configuration for receiving e-mails when ERROR messages occur.
log4j.appender.mail=org.apache.log4j.net.SMTPAppender
log4j.appender.mail.To=xxx#xxx.com
log4j.appender.mail.From=xxx#xxx.com
log4j.appender.mail.SMTPHost=mail.xxx.de
log4j.appender.mail.Threshold=ERROR
log4j.appender.mail.Subject=Jobs Batch Error
log4j.appender.mail.layout=org.apache.log4j.PatternLayout
log4j.appender.mail.layout.ConversionPattern=%d %-5p %c %x - %m%n
any ideas?
Thanks

Adjust to suite your needs:
log4j.rootCategory=DEBUG, C
log4j.appender.C=org.apache.log4j.ConsoleAppender
log4j.appender.C.layout=org.apache.log4j.PatternLayout
log4j.appender.C.layout.ConversionPattern=%d{MMddyyyy HH:mm} %-5p %c{1}:%L - %m%n
log4j.appender.C.Target=System.out

Things to check:
What is the name of your Log4j property file? The default is log4j.properties, which is what the Log4j library will look for on startup.
Related to what Thorbjorn asks in his comment, where is the log4j property file located? Placing it in the default package will ensure it's found (by default Log4j searches the classpath).
Optionally specify the location of the log4j property file using the log4j.configuration property when starting the JVM.

i was stupid by myself.
i was using the -Dlog4j.configuration to set my file.
BUT i was also configuring log4j programmatically to use the SAME configuration file.
i still do not understand why it did behave like that since i was just setting the SAME configuration file twice. But once i did it only once it worked as expected.

Web Service and Log4J Output to File

So, I have the log4j configurations set up and it output to the console just fine. But I need it to output to a file now. I am using Axis2 in Eclipse Galileo.
I edited the default log4j.properties file to this:
Set root category priority to INFO and its only appender to CONSOLE.
log4j.rootCategory=INFO, CONSOLE
log4j.rootCategory=INFO, CONSOLE, LOGFILE
Set the enterprise logger priority to FATAL
log4j.logger.org.apache.axis2.enterprise=FATAL
log4j.logger.de.hunsicker.jalopy.io=FATAL
log4j.logger.httpclient.wire.header=FATAL
log4j.logger.org.apache.commons.httpclient=FATAL
CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[%p] %m%n
LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=C:\Users\*username*\Desktop\Android\Android_WS\src\wtp\AndroidWS_Log.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d [%t] %-5p %c %x - %m%n
But the output is still not getting to the Log file. Any help would be much appreciated. Thanks Guys!

Remove line 2:
log4j.rootCategory=INFO, CONSOLE
Also, try using a forward slash, '/' for the directory separator:
log4j.appender.LOGFILE.File=C:/Users/*username*/Desktop/Android/Android_WS/src/wtp/AndroidWS_Log.log

Make sure that your server has write access rights to the log file.

how to make log4j to write to the console as well

Is there any way to tell to log4j to write its log to the file and to the console?
thanks
there are my properties:
log4j.rootLogger=DEBUG,console,R
log4j.rootLogger=INFO, FILE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=log4j.log
log4j.appender.FILE.MaxFileSize=512KB
log4j.appender.FILE.MaxBackupIndex=3
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n

Your root logger definition is a bit confused.
See the log4j documentation.
This is a standard Java properties file, which means that lines are treated as key=value pairs. Your second log4j.rootLogger line is overwriting the first, which explains why you aren't seeing anything on the console appender.
You need to merge your two rootLogger definitions into one. It looks like you're trying to have DEBUG messages go to the console and INFO messages to the file. The root logger can only have one level, so you need to change your configuration so that the appenders have appropriate levels.
While I haven't verified that this is correct, I'd guess it'll look something like this:
log4j.rootLogger=DEBUG,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.file=org.apache.log4j.RollingFileAppender
Note that you also have an error in casing - you have console lowercase in one place and in CAPS in another.

Your log4j File should look something like below read comments.
# Define the types of logger and level of logging
log4j.rootLogger = DEBUG,console, FILE
# Define the File appender
log4j.appender.FILE=org.apache.log4j.FileAppender
# Define Console Appender
log4j.appender.console=org.apache.log4j.ConsoleAppender
# Define the layout for console appender. If you do not
# define it, you will get an error
log4j.appender.console.layout=org.apache.log4j.PatternLayout
# Set the name of the file
log4j.appender.FILE.File=log.out
# Set the immediate flush to true (default)
log4j.appender.FILE.ImmediateFlush=true
# Set the threshold to debug mode
log4j.appender.FILE.Threshold=debug
# Set the append to false, overwrite
log4j.appender.FILE.Append=false
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n

This works well for console in debug mode
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.Target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.conversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %-5p - %m%n

Write the root logger as below for logging on both console and FILE
log4j.rootLogger=ERROR,console,FILE
And write the respective definitions like Target, Layout, and ConversionPattern (MaxFileSize for file etc).

Thats the exact usecase I was looking for my command line based tool. Wanted to show INFO on console but wanted to log more detailed info to log file. After various suggestion, finally go this solved by using 'log4j.appender.FILE.Threshold'
Something like below.:
log4j.rootLogger=DEBUG,CONSOLE,FILE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=output/log.log
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.FILE.Threshold=DEBUG