JSP + Struts: Error 9 java.lang.NoSuchFieldError: org.apache.log4j.Priority.INFO)

I need to create jsp page using struts

First i follow the below link
http://www.oracle.com/technology/obe/obe9051jdev/strutsvalidator/validator.htm#o

But when i run i got the following error.

500 Internal Server Error

java.lang.NoSuchFieldError:  org.apache.log4j.Priority.INFO  <=== i got no idea where to cause this problem

      at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:152)
      at org.apache.struts.util.PropertyMessageResources.<init>(PropertyMessageResources.java:127)
      at org.apache.struts.util.PropertyMessageResourcesFactory.createResources(PropertyMessageResourcesFactory.java:90)
      at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:577)
      at org.apache.struts.action.ActionServlet.initInternal(ActionServlet.java:1329)
      at org.apache.struts.action.ActionServlet.init(ActionServlet.java:464)

Please help urgent

LeanMoreTryMoreAsked:
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jaggernatConnect With a Mentor Commented:
Make sure your log4j.properties is set correctly.

log4j.properties file  should be  like this :

log4j.rootLogger=INFO, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%c] %m%n
log4j.logger.httpclient.wire.header=DEBUG
log4j.logger.org.apache.commons.httpclient=DEBUG
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kupra1Connect With a Mentor Commented:
Since "NoSuchFieldError" is coming, you are getting the 500 error.
The reason being is that you are probably using the log4j 1.3 instead of 1.2.

log4j1.3 doesn't extend Priority. Hence, it doesn't find the field "INFO" and throws the "NoSuchFieldError".

To avoid this, you should use log4j1.2.*.
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reach2piyushCommented:
Make sure you have both log4j.jar and commons-logging.jar in your classpath
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kupra1Connect With a Mentor Commented:
It shouldn't be the classpath issue becoz u would be getting the "NoSuchClass" error otherwise.
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LeanMoreTryMoreAuthor Commented:
it works.
that's exactly the problem is.

MANY THANKS
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jaggernatCommented:
u r welcome
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