I ran into an issue with maven release plugin.  The problem is caused by
xmlns value in project tag of the pom.  If I use
xmlns="http://maven.autf-8.org/POM/4.0.0
", release plugin report problem.  The problem is fixed after I changed to
xmlns="http://maven.apache.org/POM/4.0.0";.  Does anyone know what's
difference between these two namespaces?  Why the release plugin complain
about the first one?

Below I copied maven output.

Thanks.
Yan

===================================
Here's the relevant error output from "mvn release:prepare"
===================================

[INFO] Transforming 'cmp build test project'...
[DEBUG] No SCM translator found - skipping rewrite
[DEBUG] Executing p4 -H map4.eng.emc.com:1666 edit pom.xml
[INFO] Transforming 'cmp build test project 1'...
[DEBUG] Executing p4 -H map4.eng.emc.com:1666 edit testproject1\pom.xml
[INFO] Transforming 'cmp build test project 2'...
[DEBUG] Executing p4 -H map4.eng.emc.com:1666 edit testproject2\pom.xml
[INFO] Executing preparation goals 'clean integration-test'...
[INFO] Executing: mvn clean integration-test --no-plugin-updates -P
maven-official-releases,cmp-releases,releases,cmp-snapshots,snapshots

   [INFO] Scanning for projects...
   [INFO]
------------------------------------------------------------------------
   [ERROR] FATAL ERROR
   [INFO]
------------------------------------------------------------------------
   [INFO] Error building POM (may not be this project's POM).


   Project ID: unknown
   POM Location: f:\cmp\testProject\pom.xml

   Reason: Not a v4.0.0 POM.


   [INFO]
------------------------------------------------------------------------
   [INFO] Trace
   org.apache.maven.reactor.MavenExecutionException: Not a v4.0.0 POM.
       at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:365)
       at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:278)
       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)
   Caused by: org.apache.maven.project.InvalidProjectModelException: Not a
v4.0.0 POM.
       at org.apache.maven.project.DefaultMavenProjectBuilder.readModel (
DefaultMavenProjectBuilder.java:1299)
       at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(
DefaultMavenProjectBuilder.java:1270)
       at
org.apache.maven.project.DefaultMavenProjectBuilder.buildFromSourceFileInternal(
DefaultMavenProjectBuilder.java:414)
       at org.apache.maven.project.DefaultMavenProjectBuilder.build(
DefaultMavenProjectBuilder.java:192)
       at org.apache.maven.DefaultMaven.getProject(DefaultMaven.java:515)
       at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java
:447)
       at org.apache.maven.DefaultMaven.getProjects(DefaultMaven.java:351)
       ... 11 more
   [INFO]
------------------------------------------------------------------------
   [INFO] Total time: < 1 second
   [INFO] Finished at: Thu Nov 16 14:48:21 PST 2006
   [INFO] Final Memory: 1M/2M
   [INFO]
------------------------------------------------------------------------
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
------------------------------------------------------------------------
[INFO] Maven execution failed, exit code: '1'

[INFO]
------------------------------------------------------------------------
[DEBUG] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Maven execution
failed, exit code: '1'
       at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(
DefaultLifecycleExecutor.java:559)
       at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(
DefaultLifecycleExecutor.java:488)
       at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal (
DefaultLifecycleExecutor.java:458)
       at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures
(DefaultLifecycleExecutor.java:306)
       at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments (
DefaultLifecycleExecutor.java:219)
       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)
Caused by: org.apache.maven.plugin.MojoExecutionException: Maven execution
failed, exit code: '1'
       at org.apache.maven.plugins.release.PrepareReleaseMojo.execute (
PrepareReleaseMojo.java:110)
       at org.apache.maven.plugin.DefaultPluginManager.executeMojo(
DefaultPluginManager.java:412)
       at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(
DefaultLifecycleExecutor.java :534)
       ... 16 more
Caused by: org.apache.maven.plugins.release.ReleaseExecutionException: Maven
execution failed, exit code: '1'
       at org.apache.maven.plugins.release.phase.RunGoalsPhase.execute(
RunGoalsPhase.java :55)
       at org.apache.maven.plugins.release.DefaultReleaseManager.prepare(
DefaultReleaseManager.java:139)
       at org.apache.maven.plugins.release.PrepareReleaseMojo.execute(
PrepareReleaseMojo.java:106)
       ... 18 more
Caused by: org.apache.maven.plugins.release.exec.MavenExecutorException:
Maven execution failed, exit code: '1'
       at
org.apache.maven.plugins.release.exec.ForkedMavenExecutor.executeGoals(
ForkedMavenExecutor.java :95)
       at
org.apache.maven.plugins.release.exec.ForkedMavenExecutor.executeGoals(
ForkedMavenExecutor.java:108)
       at org.apache.maven.plugins.release.phase.RunGoalsPhase.execute(
RunGoalsPhase.java:48)
       ... 20 more
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 10 seconds
[INFO] Finished at: Thu Nov 16 14:48:21 PST 2006
[INFO] Final Memory: 5M/9M
[INFO]
------------------------------------------------------------------------

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