I saw this error message in my tomcat error log...
			

			

			java.lang.NoClassDefFoundError: org/apache/log4j/spi/ThrowableInformation
			

			at org.apache.log4j.spi.LoggingEvent.
			(LoggingEvent.java:145)
			

			at org.apache.log4j.Category.forcedLog(Category.java:372)
			

			at org.apache.log4j.Category.error(Category.java:303)
			

			

			I am using log4j 1.2.7, can anybody tell me what happened?
			

			I'll appreciate so much......