Hi.

I've the "Log4JLogger does not implement Log" exception and found in
Commons-Logging FAQ that I should post about this problem here. So here
are the details.

I run ant script which amount other thinks at some point of time calls
<ant file="other.xml" target="ivy" inheritAll="false"/>
This calls the ivy[1] target. And here I recieve aforementioned
exception. Full stacktrace of ant -v is attached.

Apache Ant version 1.6.5 compiled on July 1 2006

java version "1.5.0_10"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_10-b03)
Java HotSpot(TM) Client VM (build 1.5.0_10-b03, mixed mode, sharing)

Any help will be appreciated.

[1] http://incubator.apache.org/ivy/
-- 
Nikita Salnikov-Tarnovski aka Nikem
ivy:
parsing buildfile 
jar:file:/usr/share/ant/lib/ivy-1.3.1.jar!/fr/jayasoft/ivy/ant/antlib.xml with 
URI = jar:file:/usr/share/ant/lib/ivy-1.3.1.jar!/fr/jayasoft/ivy/ant/antlib.xml
     [null] Loading 
jar:file:/usr/share/ant/lib/ivy-1.3.1.jar!/fr/jayasoft/ivy/ant/ivy.properties
:: Ivy 1.3.1 - 20060330160721 :: http://ivy.jayasoft.org/ ::
      [ant] Exiting /home/nikem/dev/EHL/ehl-root/work/build.xml.

BUILD FAILED
/home/nikem/dev/EHL/ehl-root/build.xml:11: The following error occurred while 
executing this line:
java.lang.ExceptionInInitializerError
        at 
org.apache.tools.ant.ProjectHelper.addLocationToBuildException(ProjectHelper.java:539)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:385)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
        at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.Main.runBuild(Main.java:668)
        at org.apache.tools.ant.Main.startAnt(Main.java:187)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
Caused by: java.lang.ExceptionInInitializerError
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1225)
        at 
org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:37)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
        ... 12 more
Caused by: java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at 
fr.jayasoft.ivy.url.URLHandlerRegistry.getHttp(URLHandlerRegistry.java:39)
        at 
fr.jayasoft.ivy.ant.IvyConfigure.configureURLHandler(IvyConfigure.java:143)
        at fr.jayasoft.ivy.ant.IvyConfigure.execute(IvyConfigure.java:86)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        ... 15 more
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
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
        at 
org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:100)
        ... 25 more
Caused by: org.apache.commons.logging.LogConfigurationException: 
org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:416)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
        ... 29 more
Caused by: org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)
        ... 30 more
--- Nested Exception ---
java.lang.ExceptionInInitializerError
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1225)
        at 
org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:37)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
        at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.Main.runBuild(Main.java:668)
        at org.apache.tools.ant.Main.startAnt(Main.java:187)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
Caused by: java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at 
fr.jayasoft.ivy.url.URLHandlerRegistry.getHttp(URLHandlerRegistry.java:39)
        at 
fr.jayasoft.ivy.ant.IvyConfigure.configureURLHandler(IvyConfigure.java:143)
        at fr.jayasoft.ivy.ant.IvyConfigure.execute(IvyConfigure.java:86)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        ... 15 more
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
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
        at 
org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:100)
        ... 25 more
Caused by: org.apache.commons.logging.LogConfigurationException: 
org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:416)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
        ... 29 more
Caused by: org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)
        ... 30 more
--- Nested Exception ---
java.lang.ExceptionInInitializerError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:164)
        at 
fr.jayasoft.ivy.url.URLHandlerRegistry.getHttp(URLHandlerRegistry.java:39)
        at 
fr.jayasoft.ivy.ant.IvyConfigure.configureURLHandler(IvyConfigure.java:143)
        at fr.jayasoft.ivy.ant.IvyConfigure.execute(IvyConfigure.java:86)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        at 
org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:37)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:382)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
        at org.apache.tools.ant.Task.perform(Task.java:364)
        at org.apache.tools.ant.Target.execute(Target.java:341)
        at org.apache.tools.ant.Target.performTasks(Target.java:369)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
        at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
        at org.apache.tools.ant.Main.runBuild(Main.java:668)
        at org.apache.tools.ant.Main.startAnt(Main.java:187)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
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
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
        at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
        at 
org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:100)
        ... 25 more
Caused by: org.apache.commons.logging.LogConfigurationException: 
org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:416)
        at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
        ... 29 more
Caused by: org.apache.commons.logging.LogConfigurationException: Class 
org.apache.commons.logging.impl.Log4JLogger does not implement Log
        at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)
        ... 30 more


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