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Re: NoClassDefFoundError when using embedded jetty6x

by Life is hard, and then you die :: Rate this Message:

On Fri, Feb 23, 2007 at 12:37:45PM +0000, Denis McCarthy wrote:

> >>I'm trying to use the cargo-maven2-plugin with jetty (embedded). When I
> >>try to start my container (I'm starting it as part of my integration
> >>test phase, to run selenium tests) I'm getting a noclassdeffounderror on
> >>log4j. Here's part of the trace:
> >>
> >>No suitable Log constructor [Ljava.lang.Class;@9db992 for
> >>org.apache.commons.logging.impl.Log4JLogger (Caused by
> >>java.lang.NoClassDefFoundError: org/apache/log4j/Category))
> >>
> >>As you can see, commons-logging seems to be picked up alright, so at
> >>least some dependencies seem to be available to jetty.
> >>
> >>
> >>Here's the appropriate section of the config in my pom:
> >>
> >><plugin>
> >> <groupId>org.codehaus.cargo</groupId>
> >> <artifactId>cargo-maven2-plugin</artifactId>
> >> <configuration>
> >> <wait>false</wait>
> >> <container>
> >> <containerId>jetty6x</containerId>
> >> <type>embedded</type>
> >> <dependencies>
> >> <dependency>
> >> <groupId>log4j</groupId>
> >> <artifactId>log4j</artifactId>
> >> <location>
> >>/home/dmccarthy/.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar
> >> </location>
> >> </dependency>
> >> </dependencies>
> >> </container>
> >> <configuration>

This looks like the usual classloader problem that is so common with
commons-logging. Try ensuring commons-logging is loaded the same
classloader as log4j by specifying it as a dependency too:

<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1</version>
</dependency>
</dependencies>

Cheers,

Ronald

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