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From "Michael Oliver" <oliv...@sourceonenet.com>
Subject Java2WSDL LogFactory classloader problem
Date Fri, 20 May 2005 17:40:46 GMT
I have created an ant task as follows:

<path id="compile.classpath">
    <pathelement path ="${webinf.dir}/lib/commons-beanutils.jar"/>
    <pathelement path ="${webinf.dir}/lib/commons-digester.jar"/>
    <pathelement path ="${webinf.dir}/lib/commons-logging.jar"/>
    <pathelement path ="${webinf.dir}/lib/AJContentClient.jar"/>
    <pathelement path ="${webinf.dir}/lib/AJRegistries.jar"/>
    <pathelement path ="${webinf.dir}/lib/AlariusESB.jar"/>
    <pathelement path ="${webinf.dir}/lib/log4j-1.2.8.jar"/>
    <pathelement path ="${webinf.dir}/lib/junit.jar"/>
    <pathelement path ="${webinf.dir}/lib/struts.jar"/>
    <pathelement path = "${webinf.dir}/lib/standard.jar"/>
    <pathelement path ="${webinf.dir}/classes"/>
    <pathelement path ="${classpath.external}"/>
    <pathelement path ="${classpath}"/>
</path>

<target name="axis-java2wsdl">
<echo message="Building wsdl for ${project.distname} at
${local.wsdl}}"/>
	
  <axis-java2wsdl 
	
classname="com.alarius.assignments.actions.SaveAssignmentForm"
	style= "DOCUMENT"
	namespace= "urn:http://alariussystemsllc.com/AJCCWebService/"
	location= "http://localhost:8080/AlariusAssignments/services/"
	output="AlariusAssignments.wsdl" >
 	<classpath>
 		<pathelement path ="${webinf.dir}/classes"/>
 	</classpath>
 	<classpath refid="compile.classpath"/>
			 	
  </axis-java2wsdl >
</target>

commons-logging and log4j are in the compile.classpath

When I run this target I get

axis-java2wsdl:
     [echo] Building wsdl for AlariusAssignments at
C:\Java\ArchivedWorkspaces\AlariusAssignments\AlariusAssignments.wsdl}
[axis-java2wsdl] Java2WSDL
com.alarius.assignments.actions.SaveAssignmentForm
[axis-java2wsdl] java.lang.ExceptionInInitializerError
[axis-java2wsdl] 	at java.lang.Class.forName0(Native Method)
...
[axis-java2wsdl] Caused by:
org.apache.commons.logging.LogConfigurationException:
org.apache.commons.logging.LogConfigurationException:
org.apache.commons.logging.LogConfigurationException: Class
org.apache.commons.logging.impl.Log4JLogger does not implement Log
[axis-java2wsdl] 	at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImp
l.java:532)...

So researching this I find that the Log4JLogger does not implement Log
is caused by a classloader problem.

So I found in the eclipse ant runtime preferences Global Entries, both
the commons-logging and log4j jars.  So I removed them from there and
ran ant on that target again...

axis-java2wsdl:
     [echo] Building wsdl for AlariusAssignments at
C:\Java\ArchivedWorkspaces\AlariusAssignments\AlariusAssignments.wsdl}
[axis-java2wsdl] java.lang.NoClassDefFoundError:
org.apache.commons.logging.LogFactory
[axis-java2wsdl] 	at
org.apache.axis.components.logger.LogFactory.class$(LogFactory.java:84)
...

Huh???

If the ant runtime is loading the commons-logging and log4j jars and
that causes a classloader sequence problem, then removing them from
there and leaving the ones in the compile.classpath should NOT cause a
NoClassDefFoundError.

How can it be that one way it doesn't find LogFactory and the other way
it has a classloader sequence problem?

Conversely if ant needs to load them and the ant axis task also needs to
load them, how do I ensure they are loaded in the proper sequence to
avoid the conflict?

Michael Oliver
CTO
Alarius Systems LLC
6800 E. Lake Mead Blvd, #1096
Las Vegas, NV 89156
Phone:(702)643-7425
Fax:(702)974-0341
*Note new email changed from oliverm@matrix-media.com




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