y this ClassCastException in log4j ?

[Sangeetha Rao]

I have a class called MyApp in LoggerPkg package. It has this line: private final static MyLogger logger =(MyLogger) MyLogger.getLogger(MyApp.class.getName()); MyLogger extends Logger.It has getLogger method that returns Logger object based on the LoggerFactory object. Now in the properties file if I have this line: "log4j.logger.LoggerPkg.MyApp=debug, A1" it shows the exception java.lang.ClassCastException on the line in MyApp. If I have only the rootLogger in the properties file, I dont get this Exception. Can anybody say y ASAP??

[Carol Enderlin]

I haven't tried it, but I found a note in log4j example src MyLoggerTest.java to try config files mycat.bad and mycat.good.

mycat.good snippet:

# Setting the logger factory to MyLoggerFactory solves the
# ClassCastException problem encountered with the "mycat.bad"
# configuration file.
 
log4j.loggerFactory=examples.subclass.MyLoggerFactory
 
  

[Sangeetha Rao]

Thanks Carol...can u plz give me a link to mycat.bad file !!

[Carol Enderlin]

In my log4j 1.2.9 dir "logging-log4j-1.2.9" it's in the examples directory.

mycat.bad:

 
# The usual stuff. Note that A1 is configured in root not in "some.cat"
log4j.rootLogger=DEBUG, A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
 
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%5p [%t] %c - %m%n
 
# Set the priority of "some.cat" to TRACE (defined in
# examples.customLevel.XLevel). This will actually have the side
# effect of instanciating a logger object having the name "some.cat"
# this will cause a ClassCastException if the logger object is cast
# as a MyLogger object.
 
log4j.logger.some.cat=TRACE#examples.customLevel.XLevel
 
 

mycat.good:

 
# Setting the logger factory to MyLoggerFactory solves the
# ClassCastException problem encountered with the "mycat.bad"
# configuration file.
 
log4j.loggerFactory=examples.subclass.MyLoggerFactory
 

# The usual stuff. Note that A1 is configured in root not in "some.cat"
 
log4j.rootLogger=DEBUG, A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
 
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%5p [%t] %c - %m%n
 

# Set the priority of "some.cat" to TRACE (defined in
# examples.customLevel.XLevel). Since we specified MyLoggerFactory as
# the logger factory, the following line willl also have the side
# effect of instanciating a MyLogger object having the name
# "some.cat".
 
log4j.logger.some.cat=TRACE#examples.customLevel.XLevel
 

[Sangeetha Rao]

Thanks a lott Carol