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https://issues.apache.org/jira/browse/MPH-143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Osipov closed MPH-143.
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Resolution: Duplicate
> The maven-help-plugin generates null pointer for multi-module project
> ---------------------------------------------------------------------
>
> Key: MPH-143
> URL: https://issues.apache.org/jira/browse/MPH-143
> Project: Maven Help Plugin
> Issue Type: Bug
> Components: effective-pom
> Affects Versions: 3.0.0
> Environment: windows and linux with maven 3.2.5
> Reporter: Damien
> Priority: Major
>
> The maven-help-plugin in version 3.0.0 generates a null pointer exception for
> multi-module projects when the parameter "output" is set.
> The following command failed
> {{mvn help:effective-pom -Doutput=myoutput.xml}}
> with the error
> {{[INFO] BUILD FAILURE}}
> {{[INFO]
> ------------------------------------------------------------------------}}
> {{[INFO] Total time: 2.187 s}}
> {{[INFO] Finished at: 2018-03-20T14:52:19+01:00}}
> {{[INFO] Final Memory: 24M/403M}}
> {{[INFO]
> ------------------------------------------------------------------------}}
> {{[ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom (default-cli)
> on project OFRPDVC001: Execution default-cli of goal
> org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom 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|https://www.google.com/url?q=http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException&sa=D&source=hangouts&ust=1521640353977000&usg=AFQjCNFFrjILs-lEz58QZue8xxeHq7gScQ]}}
> It doesn't happen with the previous versions, the following command helps to
> prove it :
> {{mvn org.apache.maven.plugins:maven-help-plugin:2.2:effective-pom
> -Doutput=myoutput.xml}}
>
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