[MNG-4207] Plugins that use ArtifactResolver with http repositories AND depend on log4j run into ExceptionInInitializerError

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.2.0
• Component/s: Artifacts and Repositories, Class Loading
• Assignee: John Dennis Casey
• Reporter: John Dennis Casey
• Created: 17/Jun/09 11:28
• Updated: 17/Jun/09 16:39
• Resolved: 17/Jun/09 16:39

Description

plugins that use log4j as a dependency and that also resolve artifacts using the ArtifactResolver to access one or more http repositories are running into a stacktrace as follows:

[FATAL ERROR] org.apache.maven.plugin.coreit.ItMojo#execute() caused a linkage error (java.lang.ExceptionInInitializerError) and may be out-of-date. 
    Check the realms:
[FATAL ERROR] Plugin realm = app0.child-container[org.apache.maven.its.plugins:maven-it-plugin-log4j:2.1-SNAPSHOT]
urls[0] = file:/Users/jdcasey/.m2/repository/org/apache/maven/its/plugins/maven-it-plugin-log4j/2.1-SNAPSHOT/maven-it-plugin-log4j-2.1-SNAPSHOT.jar
urls[1] = file:/Users/jdcasey/.m2/repository/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
urls[2] = file:/Users/jdcasey/.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar
[FATAL ERROR] Container realm = plexus.core
urls[0] = file:/Users/jdcasey/apps/maven/apache-maven-2.2.0-RC3-SNAPSHOT/lib/maven-2.2.0-RC3-SNAPSHOT-uber.jar
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
org/apache/log4j/Category
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
java.lang.ExceptionInInitializerError
        at org.apache.maven.wagon.shared.http.AbstractHttpClientWagon.openConnectionInternal(AbstractHttpClientWagon.java:153)
        at org.apache.maven.wagon.AbstractWagon.openConnection(AbstractWagon.java:105)
        at org.apache.maven.wagon.AbstractWagon.connect(AbstractWagon.java:207)
        at org.apache.maven.artifact.manager.DefaultWagonManager.getRemoteFile(DefaultWagonManager.java:439)
        at org.apache.maven.artifact.manager.DefaultWagonManager.getArtifact(DefaultWagonManager.java:372)
        at org.apache.maven.artifact.manager.DefaultWagonManager.getArtifact(DefaultWagonManager.java:327)
        at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:216)
        at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:90)
        at org.apache.maven.plugin.coreit.ItMojo.execute(ItMojo.java:97)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:540)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:519)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:41)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: hidden.org.apache.commons.logging.LogConfigurationException: 
    hidden.org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@986c47 for 
    hidden.org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category) 
    (Caused by hidden.org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@986c47 
    for hidden.org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category))
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
        at hidden.org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
        at hidden.org.apache.commons.httpclient.HttpClient.<clinit>(HttpClient.java:66)
        ... 28 more
Caused by: hidden.org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@986c47 
    for hidden.org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Category)
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
        ... 32 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Category
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
        at java.lang.Class.getConstructor0(Class.java:2671)
        at java.lang.Class.getConstructor(Class.java:1629)
        at hidden.org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
        ... 33 more

The problem seems to come from some sort of conflict between the dependencies of httpclient, which is now included in the Maven core as part of the non-lightweight http wagon, and other users of log4j (plugins, mainly). Still tracking down the exact cause of the problem, trying to determine how best to fix it. I'm including Benjamin Bentmann's original test case for this issue, since he's the one who has done most of the legwork at this point.

instructions for the attached files (maven-it-plugin-log4j.zip and pom.xml):

1. unpack and install the IT plugin using Maven
2. Using the attached pom.xml as the project POM, try `mvn initialize -X`
3. observe the stacktrace that results.

Issue Links

• is related to: MNG-4147 very long passwords cause LightweightHTTP wagon to line-wrap the Base64-encoded Authorization header