[ 
http://jira.codehaus.org/browse/MNG-2319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_91205
 ] 

Arnaud Heritier commented on MNG-2319:
--------------------------------------

I reproduced it with maven 2.0.5
For example in plexus you can launch : mvn clean eclipse:eclipse idea:idea 
install
But if you launch each phase/goal separately, the problem doesn't occur.
You can reproduce it in others projects like archiva, continuum, ...

> strange issue when trying to generate a site which uses the multi project and 
> assembly stuff
> --------------------------------------------------------------------------------------------
>
>                 Key: MNG-2319
>                 URL: http://jira.codehaus.org/browse/MNG-2319
>             Project: Maven 2
>          Issue Type: Bug
>          Components: Artifacts and Repositories
>    Affects Versions: 2.0.4
>            Reporter: james strachan
>             Fix For: 2.1.x
>
>
> Grab a checkout of ActiveMQ and try
> mvn clean install site:site -Dmaven.test.skip=true                          
> And you get this - which seems to be related to maven's insistence on 
> rebuilding everything again when it tries to build the 'assembly' module.
> [INFO] Preparing assembly:assembly
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] Building ActiveMQ
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] Skipping missing optional mojo: 
> org.apache.maven.plugins:maven-site-plugin:attach-descriptor
> [INFO] No goals needed for project - skipping
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] Building ActiveMQ :: JAAS
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] 
> ------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] null
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] Trace
> java.lang.NullPointerException
>         at 
> org.apache.maven.artifact.ArtifactUtils.copyArtifact(ArtifactUtils.java:109)
>         at org.apache.maven.project.MavenProject.<init>(MavenProject.java:251)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkProjectLifecycle(DefaultLifecycleExecutor.java:886)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkLifecycle(DefaultLifecycleExecutor.java:729)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:505)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:475)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:454)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
>         at 
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
>         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
>         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
>         at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
>         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)
> [INFO] -----------------------------------------------------------------
> If you try just to make the site via
> mvn clean  site:site -Dmaven.test.skip=true  
> then you get...
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] Building ActiveMQ :: Assembly
> [INFO]    task-segment: [clean, site:site]
> [INFO] 
> ----------------------------------------------------------------------------
> [INFO] snapshot incubator-activemq:maven-bundle-plugin:4.0-SNAPSHOT: checking 
> for updates from codehaus.snapshots
> [INFO] snapshot incubator-activemq:maven-bundle-plugin:4.0-SNAPSHOT: checking 
> for updates from maven-csharp-plugins
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] [clean:clean]
> [INFO] Deleting directory /workspace/eclipse/activemq/assembly/target
> [INFO] Deleting directory /workspace/eclipse/activemq/assembly/target/classes
> [INFO] Deleting directory 
> /workspace/eclipse/activemq/assembly/target/test-classes
> [INFO] Preparing surefire-report:report
> [INFO] [resources:resources]
> [INFO] Using default encoding to copy filtered resources.
> [INFO] snapshot incubator-activemq:activemq-web-demo:4.0-SNAPSHOT: checking 
> for updates from apache.snapshots
> [INFO] snapshot incubator-activemq:activemq-web-demo:4.0-SNAPSHOT: checking 
> for updates from codehaus-snapshot
> [INFO] snapshot incubator-activemq:activemq-web-demo:4.0-SNAPSHOT: checking 
> for updates from maven-csharp
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] snapshot incubator-activemq:activemq-web-demo:4.0-SNAPSHOT: checking 
> for updates from apache-maven1-snapshot
> Downloading: 
> http://cvs.apache.org/repository/incubator-activemq/wars/activemq-web-demo-4.0-20060516.121213-13.war
> [INFO] snapshot incubator-activemq:activemq-optional:4.0-SNAPSHOT: checking 
> for updates from apache.snapshots
> [INFO] snapshot incubator-activemq:activemq-optional:4.0-SNAPSHOT: checking 
> for updates from codehaus-snapshot
> [INFO] snapshot incubator-activemq:activemq-optional:4.0-SNAPSHOT: checking 
> for updates from maven-csharp
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] snapshot incubator-activemq:activemq-optional:4.0-SNAPSHOT: checking 
> for updates from apache-maven1-snapshot
> Downloading: 
> http://cvs.apache.org/repository/incubator-activemq/jars/activemq-optional-4.0-20060516.121213-13.jar
> [INFO] snapshot incubator-activemq:activecluster:4.0-SNAPSHOT: checking for 
> updates from apache.snapshots
> [INFO] snapshot incubator-activemq:activecluster:4.0-SNAPSHOT: checking for 
> updates from codehaus-snapshot
> [INFO] snapshot incubator-activemq:activecluster:4.0-SNAPSHOT: checking for 
> updates from maven-csharp
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] snapshot incubator-activemq:activecluster:4.0-SNAPSHOT: checking for 
> updates from apache-maven1-snapshot
> Downloading: 
> http://cvs.apache.org/repository/incubator-activemq/jars/activecluster-4.0-20060516.121213-13.jar
> [INFO] snapshot incubator-activemq:activemq-console:4.0-SNAPSHOT: checking 
> for updates from apache.snapshots
> [INFO] snapshot incubator-activemq:activemq-console:4.0-SNAPSHOT: checking 
> for updates from codehaus-snapshot
> [INFO] snapshot incubator-activemq:activemq-console:4.0-SNAPSHOT: checking 
> for updates from maven-csharp
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] snapshot incubator-activemq:activemq-console:4.0-SNAPSHOT: checking 
> for updates from apache-maven1-snapshot
> Downloading: 
> http://cvs.apache.org/repository/incubator-activemq/jars/activemq-console-4.0-20060516.121213-13.jar
> [INFO] snapshot incubator-activemq:activemq-rar:4.0-SNAPSHOT: checking for 
> updates from apache.snapshots
> [INFO] snapshot incubator-activemq:activemq-rar:4.0-SNAPSHOT: checking for 
> updates from codehaus-snapshot
> [INFO] snapshot incubator-activemq:activemq-rar:4.0-SNAPSHOT: checking for 
> updates from maven-csharp
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - RETRYING
> [WARNING] *** CHECKSUM FAILED - Invalid checksum file - IGNORING
> [INFO] snapshot incubator-activemq:activemq-rar:4.0-SNAPSHOT: checking for 
> updates from apache-maven1-snapshot
> Downloading: 
> http://cvs.apache.org/repository/incubator-activemq/rars/activemq-rar-4.0-20060516.121213-13.rar
> [INFO] 
> ------------------------------------------------------------------------
> [ERROR] BUILD ERROR
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] Failed to resolve artifact.
> Missing:
> ----------
> 1) incubator-activemq:activemq-web-demo:war:4.0-SNAPSHOT
>   Try downloading the file manually from the project website.
>   Then, install it using the command: 
>       mvn install:install-file -DgroupId=incubator-activemq 
> -DartifactId=activemq-web-demo \
>           -Dversion=4.0-20060516.121213-13 -Dpackaging=war 
> -Dfile=/path/to/file
>   Path to dependency: 
>         1) incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
>         2) incubator-activemq:activemq-web-demo:war:4.0-SNAPSHOT
> 2) incubator-activemq:activemq-optional:jar:4.0-SNAPSHOT
>   Try downloading the file manually from the project website.
>   Then, install it using the command: 
>       mvn install:install-file -DgroupId=incubator-activemq 
> -DartifactId=activemq-optional \
>           -Dversion=4.0-20060516.121213-13 -Dpackaging=jar 
> -Dfile=/path/to/file
>   Path to dependency: 
>         1) incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
>         2) incubator-activemq:activemq-optional:jar:4.0-SNAPSHOT
> 3) incubator-activemq:activecluster:jar:4.0-SNAPSHOT
>   Try downloading the file manually from the project website.
>   Then, install it using the command: 
>       mvn install:install-file -DgroupId=incubator-activemq 
> -DartifactId=activecluster \
>           -Dversion=4.0-20060516.121213-13 -Dpackaging=jar 
> -Dfile=/path/to/file
>   Path to dependency: 
>         1) incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
>         2) incubator-activemq:activecluster:jar:4.0-SNAPSHOT
> 4) incubator-activemq:activemq-console:jar:4.0-SNAPSHOT
>   Try downloading the file manually from the project website.
>   Then, install it using the command: 
>       mvn install:install-file -DgroupId=incubator-activemq 
> -DartifactId=activemq-console \
>           -Dversion=4.0-20060516.121213-13 -Dpackaging=jar 
> -Dfile=/path/to/file
>   Path to dependency: 
>         1) incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
>         2) incubator-activemq:activemq-console:jar:4.0-SNAPSHOT
> 5) incubator-activemq:activemq-rar:rar:4.0-SNAPSHOT
>   Try downloading the file manually from the project website.
>   Then, install it using the command: 
>       mvn install:install-file -DgroupId=incubator-activemq 
> -DartifactId=activemq-rar \
>           -Dversion=4.0-20060516.121213-13 -Dpackaging=rar 
> -Dfile=/path/to/file
>   Path to dependency: 
>         1) incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
>         2) incubator-activemq:activemq-rar:rar:4.0-SNAPSHOT
> ----------
> 5 required artifacts are missing.
> for artifact: 
>   incubator-activemq:incubator-activemq:jar:4.0-SNAPSHOT
> from the specified remote repositories:
>   central (http://repo1.maven.org/maven2),
>   apache.snapshots (http://cvs.apache.org/maven-snapshot-repository),
>   codehaus-snapshot (http://snapshots.maven.codehaus.org/maven2),
>   apache-maven1-snapshot (http://cvs.apache.org/repository),
>   maven-csharp (http://maven-csharp.javaforge.com/repo)
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] For more information, run Maven with the -e switch
> [INFO] 
> ------------------------------------------------------------------------
> [INFO] Total time: 1 minute 26 seconds
> [INFO] Finished at: Wed May 24 11:32:08 BST 2006
> [INFO] Final Memory: 29M/63M                                                  
>                  
> which is bizarre as 'mvn clean install' works fine

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