question on log4j and eclipse

[David Liu]

I follow the example in the book "eclipse in action"
but in the console the following displays
"log4j:WARN No appenders could be found for logger (org.eclipseguide.persistence.FilePersistenceServices).
log4j:WARN Please initialize the log4j system properly."
and the following is the log4j.properties
"# Set root logger to DEBUG and assign two appenders
log4j.rootLogger=DEBUG, myConsole, myLogFile
# Console appender
log4j.appender.myConsole=org.apache.log4j.ConsoleAppender
log4j.appender.myConsole.layout=org.apache.log4j.PatternLayout
log4j.appender.myConsole.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
# Rolling file appender
log4j.appender.myLogFile=org.apache.log4j.RollingFileAppender
log4j.appender.myLogFile.File=mylog.log
log4j.appender.myLogFile.MaxFileSize=100KB
log4j.appender.myLogFile.MaxBackupIndex=2
log4j.appender.myLogFile.layout=org.apache.log4j.PatternLayout
log4j.appender.myLogFile.layout.ConversionPattern= %d{MMM d, yyyy hh:mm:ss a}: %p [%t] %m%n
log4j.appender.myLogFile.threshold=DEBUG"
what's wrong???
plz do me a favor
thanks

[Barry Gaunt]

It looks like someone else is having similar problems - here on Manning's Meet the Author forum.