[jira] Commented: (MSHADE-30) duplicate entry error

["Johannes Zillmann (JIRA)" <ji...@codehaus.org>]

    [ http://jira.codehaus.org/browse/MSHADE-30?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=144915#action_144915 ] 

Johannes Zillmann commented on MSHADE-30:
-----------------------------------------

Have the same problem in a multiproject setup.
Project A contains submodule B.
B's pom.xml contains the shade setup (like the example).
Now from A i execute:

{noformat}
mvn clean package install -Dmaven.test.skip -o
{noformat}
That gives me:
{noformat}
[jar:jar]
[INFO] [shade:shade {execution: default}]
[INFO] Including commons-cli:commons-cli:jar:1.1 in the shaded jar.
[INFO] Excluding log4j:log4j:jar:1.2.13 from the shaded jar.
[INFO] Excluding org.apache.maven:maven-script-ant:jar:2.0.1 from the shaded jar.
[INFO] Excluding org.apache.maven:maven-plugin-api:jar:2.0.1 from the shaded jar.
[INFO] Excluding org.codehaus.plexus:plexus-ant-factory:jar:1.0-alpha-1 from the shaded jar.
[INFO] Excluding ant:ant-launcher:jar:1.6.5 from the shaded jar.
[INFO] Excluding ant:ant:jar:1.6.5 from the shaded jar.
[INFO] Excluding org.codehaus.plexus:plexus-utils:jar:1.0.5 from the shaded jar.
[INFO] Excluding classworlds:classworlds:jar:1.1-alpha-2 from the shaded jar.
[INFO] Excluding org.codehaus.plexus:plexus-container-default:jar:1.0-alpha-8 from the shaded jar.
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error creating shaded jar.

Embedded error: duplicate entry: org/apache/commons/cli/AlreadySelectedException.class
[INFO] ------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error creating shaded jar.
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:478)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
        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: org.apache.maven.plugin.MojoExecutionException: Error creating shaded jar.
        at org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:327)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
        ... 16 more
Caused by: java.util.zip.ZipException: duplicate entry: org/apache/commons/cli/AlreadySelectedException.class
        at java.util.zip.ZipOutputStream.putNextEntry(ZipOutputStream.java:163)
        at java.util.jar.JarOutputStream.putNextEntry(JarOutputStream.java:90)
        at org.apache.maven.plugins.shade.DefaultShader.addRemappedClass(DefaultShader.java:182)
        at org.apache.maven.plugins.shade.DefaultShader.shade(DefaultShader.java:104)
        at org.apache.maven.plugins.shade.mojo.ShadeMojo.execute(ShadeMojo.java:285)
        ... 18 more
{noformat}

> duplicate entry error
> ---------------------
>
>                 Key: MSHADE-30
>                 URL: http://jira.codehaus.org/browse/MSHADE-30
>             Project: Maven 2.x Shade Plugin
>          Issue Type: Bug
>    Affects Versions: 1.0.1
>            Reporter: Michael Mattox
>
> I receive this error:
> Embedded error: duplicate entry: org/apache/xmlbeans/FilterXmlObject.class
> It started with a javax.xml.namespace class.  So I started putting excludes, and then I kept getting one new class after another.  If I exclude everything then I doubt my application is going to work.
> I really don't understand this error.  I have never seen this type of error with the fatjar eclipse plugin.  I understand it's complaining about having the same class twice, but if it's not a problem for my eclipse project or the maven build, why is it a problem for shade?
> I feel the shade plugin should be able to handle this gracefully.

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