[MPH-135] help:effective-pom crashes with NPE in multi module builds with -Doutput set

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.1
• Component/s: effective-pom
• Assignee: Michael Osipov
• Reporter: Hans-Joachim Kliemeck
• Created: 09/Mar/18 07:56
• Updated: 22/Mar/18 21:48
• Resolved: 18/Mar/18 22:41

Description

Hi,

we see build failures on all our pipelines with the new version 3.0.0. Is this an official version or was this version recalled? Is there a breaking change related to xml parsing / encoding?

https://github.com/apache/maven-help-plugin/releases/tag/maven-help-plugin-3.0.0

13:45:17 INFO - ------------------------------------------------------------------------
13:45:17 ERROR - Failed to execute goal org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom (default-cli) on project composites: Execution default-cli of goal org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom failed. NullPointerException -> [Help 1]
13:45:17 INFO - org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom (default-cli) on project composites: Execution default-cli of goal org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom failed.
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:224)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
13:45:17 INFO - 	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
13:45:17 INFO - 	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
13:45:17 INFO - 	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
13:45:17 INFO - 	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
13:45:17 INFO - 	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
13:45:17 INFO - 	at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
13:45:17 INFO - 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
13:45:17 INFO - 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
13:45:17 INFO - 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
13:45:17 INFO - 	at java.lang.reflect.Method.invoke(Method.java:483)
13:45:17 INFO - 	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
13:45:17 INFO - 	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
13:45:17 INFO - 	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
13:45:17 INFO - 	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
13:45:17 INFO - Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal org.apache.maven.plugins:maven-help-plugin:3.0.0:effective-pom failed.
13:45:17 INFO - 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
13:45:17 INFO - 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
13:45:17 INFO - 	... 20 more
13:45:17 INFO - Caused by: java.lang.NullPointerException
13:45:17 INFO - 	at org.codehaus.plexus.util.xml.XmlStreamWriter.close(XmlStreamWriter.java:75)
13:45:17 INFO - 	at org.codehaus.plexus.util.IOUtil.close(IOUtil.java:796)
13:45:17 INFO - 	at org.apache.maven.plugins.help.AbstractEffectiveMojo.writeXmlFile(AbstractEffectiveMojo.java:96)
13:45:17 INFO - 	at org.apache.maven.plugins.help.EffectivePomMojo.execute(EffectivePomMojo.java:139)
13:45:17 INFO - 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
13:45:17 INFO - 	... 21 more
13:45:17 ERROR - 
13:45:17 ERROR - Re-run Maven using the -X switch to enable full debug logging.

Best Regards

Hajo

Issue Links

• is duplicated by: MPH-143 The maven-help-plugin generates null pointer for multi-module project