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https://issues.apache.org/jira/browse/MENFORCER-308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17343134#comment-17343134
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Slawomir Jaranowski commented on MENFORCER-308:
-----------------------------------------------
https://github.com/fabric8io/docker-maven-plugin/issues/1146
> NullPointerException when using enforcer and assembly plugin in same pom.xml
> ----------------------------------------------------------------------------
>
> Key: MENFORCER-308
> URL: https://issues.apache.org/jira/browse/MENFORCER-308
> Project: Maven Enforcer Plugin
> Issue Type: Bug
> Components: Plugin
> Affects Versions: 1.4.1, 3.0.0-M1, 3.0.0-M2
> Environment: Windows 7, JDK 1.8.0_172
> Reporter: thomas collignon
> Priority: Major
> Attachments: error.log
>
>
> Hi,
>
> I got a problem when a project contain a declaration of maven-enforcer-plugin
> >= 1.4.1 and maven-assembly-plugin, and I think one dependency with runtime
> scope.
> I have made a little project who reproduce the case :
> [https://github.com/tcollignon/maven_reproduce_cases/tree/master/enforcer_and_assembly]
> => just run _mvn clean install_ and see the error :
>
> {quote}$ mvn clean install
> [INFO] Scanning for projects...
> [INFO]
> [INFO] ------------------< org.tcollignon:enforcer-assembly
> >------------------
> [INFO] Building enforcer and assembly reproduce case 1.0.0-SNAPSHOT
> [INFO] --------------------------------[ pom
> ]---------------------------------
> [INFO]
> [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ enforcer-assembly
> ---
> [INFO] Deleting
> D:\java\workspaces\developpement_test\maven_reproduce_cases\enforcer_and_assembly\target
> [INFO]
> [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-maven-version) @
> enforcer-assembly ---
> [INFO]
> [INFO] --- maven-assembly-plugin:3.1.0:single (make-assembly) @
> enforcer-assembly ---
> [INFO] Reading assembly descriptor: zip.xml
> [WARNING] Cannot include project artifact:
> org.tcollignon:enforcer-assembly:pom:1.0.0-SNAPSHOT; it doesn't have an
> associated file or directory.
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 1.092 s
> [INFO] Finished at: 2018-06-21T15:59:17+02:00
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-assembly-plugin:3.1.0:single (make-assembly)
> on project enforcer-assembly: Execution make-assembly of goal
> org.apache.maven.plugins:maven-assembly-plugin:3.1.0:single failed.:
> NullPointerException -> [Help 1]
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e
> switch.
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [ERROR]
> [ERROR] For more information about the errors and possible solutions, please
> read the following articles:
> [ERROR] [Help 1]
> http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
> Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m;
> support was removed in 8.0
> {quote}
>
> I put in attach the full log in debug mode.
>
> With a little debug, I can see that on runtime scope dependency this is null
> : Artifact#getFile, but I don't know why.
>
> When I try with maven-enforcer-plugin 1.4 it works well.
> I try with other version of maven-assembly-plugin and it doesn't change
> anything.
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