Can't use Junit in eclipse3!?

[liren]

Hi friends:

I want to do a Junit test for my spring app in eclipse3.When I run test, it report error:

org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.) (Caused by org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.))
	at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
	at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
	at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
	at org.springframework.context.support.AbstractApplicationContext.<init>&#40;AbstractApplicationContext.java&#58;115&#41;
	at org.springframework.context.support.AbstractXmlApplicationContext.<init>&#40;AbstractXmlApplicationContext.java&#58;47&#41;
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>&#40;FileSystemXmlApplicationContext.java&#58;80&#41;
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>&#40;FileSystemXmlApplicationContext.java&#58;68&#41;
	at org.springframework.context.support.FileSystemXmlApplicationContext.<init>&#40;FileSystemXmlApplicationContext.java&#58;59&#41;
	at lyo.test.dao.TestSonDAOImp.setUp&#40;TestSonDAOImp.java&#58;39&#41;
Caused by&#58; org.apache.commons.logging.LogConfigurationException&#58; org.apache.commons.logging.LogConfigurationException&#58; Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. &#40;Caused by org.apache.commons.logging.LogConfigurationException&#58; Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.&#41;
	at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor&#40;LogFactoryImpl.java&#58;397&#41;
	at org.apache.commons.logging.impl.LogFactoryImpl.newInstance&#40;LogFactoryImpl.java&#58;529&#41;
	... 17 more
Caused by&#58; org.apache.commons.logging.LogConfigurationException&#58; Invalid class loader hierarchy.  You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.
	at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor&#40;LogFactoryImpl.java&#58;385&#41;
	... 18 more

I remove common-log package from hibernate library.But the problem is the same. Did someone come across this problem? It is eclipse problem? Thks!

[cwilkes]

I remove common-log package from hibernate library.

If you want to see the gory details of what's going on see http://www.qos.ch/logging/classloader.jsp

For now I would look at this

at lyo.test.dao.TestSonDAOImp.setUp(TestSonDAOImp.java:39)

And see what's happening at line 39 of your code. Are you doing anything with log4j? If so try and take it out and see if that helps.

[smccrory]

I've encountered lots of problems with JCL and Websphere, and avoid it like the plague now.