On Nov 4, 2008, at 1:32 PM, Tom Hsu wrote:
Hi experts,
I am using a an xml document to configure the Log4j from apache.
However, I am seeing an class cast exception when I try to run my
Java program which configures the log4j through a xml document. The
trace is attached. I don't understand the following 2 errors:
1. java.lang.ClassCastException: org.apache.log4j.ConsoleAppender
cannot be cast to org.apache.log4j.Appender
2.log4j:ERROR Could not parse input source
[EMAIL PROTECTED]
java.lang.NullPointerException
I am sure that the xml is well-formed because I was able to use that
xml in an existing system. I have also attached the xml config file.
If anyone can provide some pointers, it'd be greatly appreciated!
You don't mention the environment that you are running the code in,
but it would appear that you have multiple class loaders and that is
causing the cast from ConsoleAppender to Appender to fail. The
ClassCastException results in the NullPointerException that occurs
later. Please check if you have multiple log4j.jar's in your
installation.
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