I&#39;ve got an interesting problem in which the org.apache.log4j.Logger class is not found during runtime. I&#39;m trying to get authorized and that is where it&#39;s failing:

`OAuthAuthorizer oauthAuthorizer = new OAuthAuthorizer(OAUTH_CONSUMER_KEY, OAUTH_CONSUMER_SECRET, SAML_PROVIDER_ID, userId);`

I&#39;m using JDeveloper 11.1.1.6. Here is what I know:

1. I&#39;ve looked in my UI.war/WEB-INF/lib directory and I see the log4j-1.2.17.jar there.

2. The class complaining about it is org.opensaml.xml.XMLConfigurator

        Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
        	at org.opensaml.xml.XMLConfigurator.&lt;clinit&gt;(XMLConfigurator.java:60)
        	at org.opensaml.DefaultBootstrap.initializeXMLTooling(DefaultBootstrap.java:195)
        	at org.opensaml.DefaultBootstrap.bootstrap(DefaultBootstrap.java:91)
        	at com.intuit.ipp.aggcat.util.SAML2AssertionGenerator.getSAMLBuilder(SAML2AssertionGenerator.java:156)
        	at com.intuit.ipp.aggcat.util.SAML2AssertionGenerator.createSubject(SAML2AssertionGenerator.java:187)
        	at com.intuit.ipp.aggcat.util.SAML2AssertionGenerator.buildAssertion(SAML2AssertionGenerator.java:114)
        	at com.intuit.ipp.aggcat.util.SAML2AssertionGenerator.generateSignedAssertion(SAML2AssertionGenerator.java:83)
        	at com.intuit.ipp.aggcat.util.SamlUtil.createSignedSAMLPayload(SamlUtil.java:156)
        	at com.intuit.ipp.aggcat.util.OAuthUtil.getOAuthTokens(OAuthUtil.java:60)
        	at com.intuit.ipp.aggcat.core.OAuthAuthorizer.&lt;init&gt;(OAuthAuthorizer.java:85)
        	at com.incomemax.view.intuit.WebUtil.getAggCatService(WebUtil.java:91)

    &lt;!-- --&gt;

        Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
        	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        	at java.security.AccessController.doPrivileged(Native Method)
        	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        	at java.lang.ClassLoader.loadClass(ClassLoader.java:305)
        	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        	at java.lang.ClassLoader.loadClass(ClassLoader.java:246)
        	... 64 more

3. I decomplied XMLConfigurator and oddly it doesn&#39;t import org.apache.log4j.Logger It uses org.slf4j.Logger which is also in my jars directory (slf4j-api-1.7.5.jar). Also interesting is that line 60 (see stack trace) is a blank line in my decompile.

4. Of course if I add Logger.xxxxx during design time, it finds it just fine.

5. I&#39;m using the code/jars directly from the sample java code, but imported into my existing application.

I&#39;ve been scouring the web for answers and I believe I&#39;ve checked all the areas I can think of. I also referenced this very good page: http://myarch.com/classnotfound/

Given authorization is step 1 in using the Intuit Developer API, I&#39;m kinda stuck.

Adding output from @jhadesdev suggestion:

All versions of log4j Logger: 

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/log4j-1.2.17.jar!/org/apache/log4j/Logger.class

All versions of log4j visible from the classloader of the OAuthAuthorizer class: 

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/log4j-1.2.17.jar!/org/apache/log4j/Logger.class

All versions of XMLConfigurator: 

- jar:file:/C:/Oracle/Middleware11116/modules/com.bea.core.bea.opensaml2_1.0.0.0_6-1-0-0.jar!/org/opensaml/xml/XMLConfigurator.class

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/ipp-java-aggcat-v1-devkit-1.0.2.jar!/org/opensaml/xml/XMLConfigurator.class

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/xmltooling-1.3.1.jar!/org/opensaml/xml/XMLConfigurator.class

All versions of XMLConfigurator visible from the class loader of the OAuthAuthorizer class:

- jar:file:/C:/Oracle/Middleware11116/modules/com.bea.core.bea.opensaml2_1.0.0.0_6-1-0-0.jar!/org/opensaml/xml/XMLConfigurator.class

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/ipp-java-aggcat-v1-devkit-1.0.2.jar!/org/opensaml/xml/XMLConfigurator.class

- zip:C:/Users/Chris/AppData/Roaming/JDeveloper/system11.1.1.6.38.61.92/DefaultDomain/servers/DefaultServer/tmp/_WL_user/j2ee-app/lt5l71/war/WEB-INF/lib/xmltooling-1.3.1.jar!/org/opensaml/xml/XMLConfigurator.class

I&#39;m still working on interpreting the results.

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Caused By: java.lang.NoClassDefFoundError: org/apache/log4j/Logger