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http://jira.codehaus.org/browse/MNG-4798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=234605#action_234605
]
Jochen Stiepel commented on MNG-4798:
-------------------------------------
I found the cause of this problem!
On the SLES Server there were two JDK's installed. The Sun JDK and an IBM JDK.
JAVA_HOME was pointing to the IBM-JDK and in the PATH the Sun JDK was first:
output of: mvn -version
Apache Maven 3.0-beta-3 (r990787; 2010-08-30 14:44:03+0200)
Java version: 1.6.0
Java home: /usr/lib/jvm/java-1_6_0-ibm-1.6.0/jre
Default locale: de_DE, platform encoding: ISO-8859-1
OS name: "linux" version: "2.6.27.48-0.6-pae" arch: "x86" Family: "unix"
output of (Sun JDK): java -version
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
Java HotSpot(TM) Client VM (build 17.0-b16, mixed mode, sharing)
output of (IBM-JDK): /usr/lib/jvm/java-1_6_0-ibm-1.6.0/jre/java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build pxi3260sr8-20100409_01(SR8))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux x86-32
jvmxi3260sr8-20100401_55940 (JIT enabled, AOT enabled)
J9VM - 20100401_055940
JIT - r9_20100401_15339
GC - 20100308_AA)
JCL - 20100408_01
Then I changed the JAVA_HOME to the Sun-JDK and it works. Afterwards I changed
the JAVA_HOME and the PATH to the IBM-JDK and I'm getting the exception again.
> NullPointerException at NearestVersionConflictResolver.selectVersion()
> ----------------------------------------------------------------------
>
> Key: MNG-4798
> URL: http://jira.codehaus.org/browse/MNG-4798
> Project: Maven 2 & 3
> Issue Type: Bug
> Affects Versions: 3.0-beta-3
> Environment: Maven 3 beta-3, Linux, Java 1.6.0_21
> Reporter: Jochen Stiepel
>
> this error only occurs with Maven 3 beta-3 but not Maven 3 beta-2.
> Maby it is related to this error, but has a different stacktrace: MNG-4779
> [ERROR] Internal error: java.lang.NullPointerException -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.NullPointerException
> at
> org.apache.maven.lifecycle.internal.BuilderCommon.handleBuildError(BuilderCommon.java:141)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:99)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:315)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:445)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:168)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:132)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:600)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
> Caused by: java.lang.NullPointerException
> at
> org.sonatype.aether.util.graph.transformer.NearestVersionConflictResolver.selectVersion(NearestVersionConflictResolver.java:218)
> at
> org.sonatype.aether.util.graph.transformer.NearestVersionConflictResolver.transformGraph(NearestVersionConflictResolver.java:81)
> at
> org.sonatype.aether.util.graph.transformer.ChainedDependencyGraphTransformer.transformGraph(ChainedDependencyGraphTransformer.java:76)
> at
> org.sonatype.aether.impl.internal.DefaultDependencyCollector.collectDependencies(DefaultDependencyCollector.java:246)
> at
> org.sonatype.aether.impl.internal.DefaultRepositorySystem.collectDependencies(DefaultRepositorySystem.java:265)
> at
> org.apache.maven.project.DefaultProjectDependenciesResolver.resolve(DefaultProjectDependenciesResolver.java:117)
> at
> org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.getDependencies(LifecycleDependencyResolver.java:202)
> at
> org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveProjectDependencies(LifecycleDependencyResolver.java:141)
> at
> org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveDependencies(LifecycleDependencyResolver.java:118)
> at
> org.apache.maven.lifecycle.internal.LifecycleDependencyResolver.resolveDependencies(LifecycleDependencyResolver.java:82)
> at
> org.apache.maven.lifecycle.internal.BuilderCommon.resolveBuildPlan(BuilderCommon.java:130)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:83)
> ... 16 more
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