Re: Is mirrorOf mandatory in settings? was: Re: [jira] Reopened: (ARCHETYPE-177) NullPointerException generating archetype when mirrors are in settings.xml

Tue, 03 Jun 2008 17:12:34 -0700 

Hi Raphaël,
Having mirrors is not mandatory (this is the default for a maven installation), but if you have a mirror element, mirrorOf for that element is mandatory (I'm not sure if settings.xml reflects that, but it makes no sense with out it). 

ie, this is invalid:

<mirror>
  <id>new-central</id>
  <url>http://repo1.maven.org</url>
</mirror>

Cheers,
Brett

On 04/06/2008, at 7:11 AM, Raphaël Piéroni wrote:


Hi folks,

I answered that the mirrorOf element in settings
is mandatory, as it behave such.
But reading the http://maven.apache.org/xsd/settings-1.0.0.xsd
It seems that any element in
settings/mirrors/mirror ain't mandatory.
Which resulted in the described problem in the issue.

Here the problem on which i need some understanding of
the settings.xml.

I checked in archetype code, the only reference to mirrors is in the
GenerationRequest file.
But it is never used.

Please comment and let me know what you think about.

Thanks in advance

Raphaël

2008/6/3 Frank Adcock (JIRA) <[EMAIL PROTECTED]>:



   [ http://jira.codehaus.org/browse/ARCHETYPE-177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel 
 ]


Frank Adcock reopened ARCHETYPE-177:
------------------------------------


Why is this not a defect.


As a user you receive a null pointer exception because of something  
missing in the settings.xml file.



At the very least you should receive an error message indicating  
the problem.  If you can have a situation where the mirrorOf  
setting is optional, then it should not be throwing a null pointer  
exception but handling it better.



To my mind there is a problem, whether the priority needs to be  
adjusted to suit the impact, but certainly the way it is it takes a  
considerable amount of time to figure out what the problem is, and  
it is not necessarily obvious that the mirrorOf field is the problem.



NullPointerException generating archetype when mirrors are in  
settings.xml

--------------------------------------------------------------------------

               Key: ARCHETYPE-177
               URL: http://jira.codehaus.org/browse/ARCHETYPE-177
           Project: Maven Archetype
        Issue Type: Bug
        Components: Archetypes, Generator
       Environment: Windows XP Pro
          Reporter: Frank Adcock


When attempting to generate any archetype from the mvn  
archetype:generate command I get a null pointer exception thrown  
if I have mirrors defined in my settings.xml file.  I believe  
there is a related issue where mvn package will also get a null  
pointer exception if a repository specified in the project pom  
does not have a matching mirror id in the settings.xml.  However,  
the stack trace for the archetype generation is:
Choose a number:   
(1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/2
4/25/26/27/28/29/30/31/32/33/34/35/36/37/38/39/40/41/42/43/44)  
15: : 6
[INFO]  
------------------------------------------------------------------------

[ERROR] BUILD FAILURE

[INFO]  
------------------------------------------------------------------------

[INFO] : java.lang.NullPointerException
null

[INFO]  
------------------------------------------------------------------------

[INFO] Trace
org.apache.maven.BuildFailureException

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa

ultLifecycleExecutor.java:579)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone

Goal(DefaultLifecycleExecutor.java:512)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau

ltLifecycleExecutor.java:482)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan

dleFailures(DefaultLifecycleExecutor.java:330)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen

ts(DefaultLifecycleExecutor.java:227)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi

fecycleExecutor.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(DelegatingMethodAcces

sorImpl.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.MojoFailureException

       at  
org 
.apache.maven.archetype.mojos.CreateProjectFromArchetypeMojo.execu

te(CreateProjectFromArchetypeMojo.java:202)

       at  
org 
.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi

nManager.java:451)

       at  
org 
.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa

ultLifecycleExecutor.java:558)
       ... 16 more

[INFO]  
------------------------------------------------------------------------

[INFO] Total time: 7 seconds
[INFO] Finished at: Wed May 28 17:49:39 EST 2008
[INFO] Final Memory: 8M/14M

[INFO]  
------------------------------------------------------------------------
C:\Documents and Settings\frank\My Documents\Development 
\Sandbox>mvn -v

Maven version: 2.0.9
Java version: 1.5.0_08
OS name: "windows xp" version: "5.1" arch: "x86" Family: "windows"
The mirrored settings from the settings.xml file are:
     <mirrors>
             <mirror>
                     <id>public-snapshots</id>
                     <name>public-snapshots</name>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public-snapshots 
</url>

             </mirror>
             <mirror>
                     <id>nexus-central</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>central</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-maven-repo</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>maven-repo</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-apache-m2-incubator</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>apache.m2.incubator</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-eclipse-repository</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>eclipse-repository</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-safehaus-repository</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>safehaus-repository</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-spring-ext</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>spring-ext</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-i21-s3-osgi-repo</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>i21-s3-osgi-repo</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-i21-s3-maven-repo</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>i21-s3-maven-repo</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-appfuse</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>appfuse</mirrorOf>
             </mirror>
             <mirror>
                     <id>nexus-java.net</id>

                     <url>http://maven.ho.bushlife.com.au:8081/nexus/content/groups/public 
</url>

                     <mirrorOf>java.net</mirrorOf>
             </mirror>
     </mirrors>

These mirrored settings work for other builds within eclipse, just  
not from the archetype generation, so the proxy repo is working  
well, but the null pointer exceptions make it difficult to figure  
out what the problem is.


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--
Brett Porter
[EMAIL PROTECTED]
http://blogs.exist.com/bporter/


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