This is a classic, but really has nothing to do with Maven.
The root cause is that commons-logging and log4j are in different class
loaders. The best way to track down what is going on is to install
commons-logging 1.1 (if you are not already using that version) and to
turn on diagnostics [1]. Commons-logging might be installed in the
container and/or your webapp, so make sure you install 1.1 everywhere.
[1] http://commons.apache.org/logging/troubleshooting.html
Farrukh Najmi wrote:
Hello,
I am using cargo-maven2-plugin for deploying my webapp into my
webcontainer.
I have no problems using tomcat5x profile but when I use the jetty6x
profile with:
<container>
<containerId>jetty6x</containerId>
<type>embedded</type>
</container>
I get the following exception...
Caused by: org.apache.commons.logging.LogConfigurationException: No
suitable Log constructor [Ljava.lang.Class;@13ce64f6 for
org.apache.commons.logging.impl.Log4JLogger (Caused by
java.lang.NoClassDefFoundError: org/apache/log4j/Category)
at
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
... 28 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Category
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
at java.lang.Class.getConstructor0(Class.java:2671)
at java.lang.Class.getConstructor(Class.java:1629)
at
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
... 29 more
Having scanned the web I find the following thread that looks similar
and indicates some sort of classloader issue:
<http://www.nabble.com/Issue-stopping-Resin-3.0.23-with-Cargo-t3270890.html>
However, I cannot figure out what I need to do to fix the problem.
Thanks for any help on this show stopper issue as I would really like to
use jetty6 for deployment.
--
Dennis Lundberg
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