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From "Johannes Boesl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MJLINK-4) NPE on execution
Date Tue, 19 Sep 2017 12:56:00 GMT

    [ https://issues.apache.org/jira/browse/MJLINK-4?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171633#comment-16171633
] 

Johannes Boesl commented on MJLINK-4:
-------------------------------------

Try to build maven module 'jloadr-jre' at https://github.com/aditosoftware/jloadr/tree/merged

> NPE on execution 
> -----------------
>
>                 Key: MJLINK-4
>                 URL: https://issues.apache.org/jira/browse/MJLINK-4
>             Project: Maven JLink Plugin
>          Issue Type: Bug
>    Affects Versions: 3.0.0-alpha-1
>         Environment: Ubuntu 16.04.3 LTS
> Linux 4.4.0-93-generic
>            Reporter: Johannes Boesl
>
> When I try to run my maven build I get the following exception:
> {quote}[ERROR] Failed to execute goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink
(default-jlink) on project jloadr-jre: Execution default-jlink of goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink
failed.: NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink
(default-jlink) on project jloadr-jre: Execution default-jlink of goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink
failed.
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
> 	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
> 	at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:200)
> 	at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder$1.call(MultiThreadedBuilder.java:196)
> 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
> 	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
> 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
> 	at java.base/java.lang.Thread.run(Thread.java:844)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-jlink
of goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink failed.
> 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
> 	... 11 more
> Caused by: java.lang.NullPointerException
> 	at org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest$1.toPath(ResolvePathsRequest.java:52)
> 	at org.codehaus.plexus.languages.java.jpms.ResolvePathsRequest$1.toPath(ResolvePathsRequest.java:48)
> 	at org.codehaus.plexus.languages.java.jpms.LocationManager.resolvePaths(LocationManager.java:109)
> 	at org.apache.maven.plugins.jlink.JLinkMojo.preparePaths(JLinkMojo.java:347)
> 	at org.apache.maven.plugins.jlink.JLinkMojo.execute(JLinkMojo.java:264)
> 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
> 	... 12 more{quote}
> The cause seems to be that the following code in line 337 in JLinkMojo returns a collection
with only 'null' entries:
> {{Collection<File> dependencyArtifacts = getCompileClasspathElements( getProject()
);}}



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