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Posted to issues@maven.apache.org by "Petrica Grama (JIRA)" <ji...@codehaus.org> on 2011/04/01 20:00:23 UTC
[jira] Commented: (MNG-4947) NPE in at
org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup.findConverterForType()
[ http://jira.codehaus.org/browse/MNG-4947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=262269#action_262269 ]
Petrica Grama commented on MNG-4947:
------------------------------------
Just a small comment on this:
I think you can reproduce it by making a test with the following code:
DefaultConverterLookup dcl = new DefaultConverterLookup();
dcl.registerConverter(null);
dcl.lookupConverterForType(BooleanConverter.class);
I'm guessing that someone, somewhere, somehow (sorry for not being more precise), it's registering a null converter.
You can fix it by not allowing the registration of a null object inside the registerConverter method:
public void registerConverter( ConfigurationConverter converter )
{
if(converter != null)
{
customConverters.add( converter );
}
}
I know that this doesn't fix the actual problem but might be a way to avoid the annoying occurrence of this exception inside Hudson builds.
Just my 2 cents :)
> NPE in at org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup.findConverterForType()
> --------------------------------------------------------------------------------------------------------------------
>
> Key: MNG-4947
> URL: http://jira.codehaus.org/browse/MNG-4947
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 2.2.1
> Reporter: Ondrej Zizka
> Assignee: Benjamin Bentmann
> Attachments: MNG-4947 - NPE during site build.txt, settings-hbn.xml
>
>
> STR:
> 1) svn co https://anonsvn.jboss.org/repos/hibernate/core/tags/hibernate-3.3.2.GA_CP03
> 2) cd hibernate-3.3.2.GA_CP03/src/core
> 3) Download the attached settings-hbn.xml
> 4) mvn -s ../../settings-hbn.xml site
> hibernate/src/core $ mvn -s ../../settings-hbn.xml site
> ...
> 164K downloaded (plexus-utils-1.1.jar)
> 16K downloaded (wagon-webdav-1.0-beta-2.jar)
> [INFO] ------------------------------------------------------------------------
> [INFO] Building Hibernate Core Parent POM
> [INFO] task-segment: [site]
> [INFO] ------------------------------------------------------------------------
> [INFO] ------------------------------------------------------------------------
> [ERROR] FATAL ERROR
> [INFO] ------------------------------------------------------------------------
> [INFO] null
> [INFO] ------------------------------------------------------------------------
> [INFO] Trace
> java.lang.NullPointerException
> at org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup.findConverterForType(DefaultConverterLookup.java:115)
> at org.codehaus.plexus.component.configurator.converters.lookup.DefaultConverterLookup.lookupConverterForType(DefaultConverterLookup.java:92)
> at org.codehaus.plexus.component.configurator.converters.composite.CollectionConverter.fromConfiguration(CollectionConverter.java:175)
> at org.codehaus.plexus.component.configurator.converters.ComponentValueSetter.configure(ComponentValueSetter.java:247)
> at org.codehaus.plexus.component.configurator.converters.composite.ObjectWithFieldsConverter.processConfiguration(ObjectWithFieldsConverter.java:137)
> at org.codehaus.plexus.component.configurator.BasicComponentConfigurator.configureComponent(BasicComponentConfigurator.java:56)
> at org.codehaus.plexus.component.configurator.AbstractComponentConfigurator.configureComponent(AbstractComponentConfigurator.java:54)
> at org.codehaus.plexus.component.configurator.AbstractComponentConfigurator.configureComponent(AbstractComponentConfigurator.java:47)
> at org.codehaus.plexus.personality.plexus.lifecycle.phase.AutoConfigurePhase.execute(AutoConfigurePhase.java:39)
> at org.codehaus.plexus.lifecycle.AbstractLifecycleHandler.start(AbstractLifecycleHandler.java:101)
> at org.codehaus.plexus.component.manager.AbstractComponentManager.startComponentLifecycle(AbstractComponentManager.java:105)
> at org.codehaus.plexus.component.manager.AbstractComponentManager.createComponentInstance(AbstractComponentManager.java:95)
> at org.codehaus.plexus.component.manager.ClassicSingletonComponentManager.getComponent(ClassicSingletonComponentManager.java:92)
> at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:331)
> at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:440)
> at org.apache.maven.execution.MavenSession.lookup(MavenSession.java:138)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.findMappingsForLifecycle(DefaultLifecycleExecutor.java:1358)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindLifecycleForPackaging(DefaultLifecycleExecutor.java:1292)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:1275)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:534)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
> at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
> at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
> 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:597)
> 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] ------------------------------------------------------------------------
> [INFO] Total time: 1 minute 4 seconds
> [INFO] Finished at: Mon Dec 20 17:32:55 CET 2010
> [INFO] Final Memory: 9M/303M
> [INFO] ------------------------------------------------------------------------
> ondra@ondra-redhat: ~/work/hbn/runner/EAP-5.1/work-space/src/core $
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