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https://issues.apache.org/jira/browse/MTOMCAT-168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13425046#comment-13425046
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Olivier Lamy (*$^¨%`£) commented on MTOMCAT-168:
------------------------------------------------
that must be fixed with 2.0-SNAPSHOT.
Can you try it ? see
http://tomcat.apache.org/maven-plugin-2.0-SNAPSHOT/snapshot-test.html
> Nullpointer exception in run mojo
> ---------------------------------
>
> Key: MTOMCAT-168
> URL: https://issues.apache.org/jira/browse/MTOMCAT-168
> Project: Apache Tomcat Maven Plugin
> Issue Type: Bug
> Components: tomcat7
> Affects Versions: 2.0-beta-1
> Environment: windows mingw
> Reporter: Jiri Peinlich
> Assignee: Olivier Lamy (*$^¨%`£)
>
> when using enpty aditionalClasspathDir tag in the the plugin settings and
> running the mvn tomcat7:run mojo I got the following nullpointer exception.
> I am currently learning how the whole plugin works. I got the initial plugin
> configuration from here:
> http://tomcat.apache.org/maven-plugin-2/run-mojo-features.html
> I removed parts that are not applicable for my project but i kept the empty
> additionalClasspathDir as in the example:
> <additionalClasspathDirs>
> <additionalClasspathDir></additionalClasspathDir>
> </additionalClasspathDirs>
> When removing this section i did not get the exception anymore
> Null Pointer exception:
> [ERROR] Failed to execute goal
> org.apache.tomcat.maven:tomcat7-maven-plugin:2.0-
> beta-1:run (default-cli) on project ITA: Execution default-cli of goal
> org.apach
> e.tomcat.maven:tomcat7-maven-plugin:2.0-beta-1:run failed.
> NullPointerException
> -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal o
> rg.apache.tomcat.maven:tomcat7-maven-plugin:2.0-beta-1:run (default-cli) on
> proj
> ect ITA: Execution default-cli of goal
> org.apache.tomcat.maven:tomcat7-maven-plu
> gin:2.0-beta-1:run failed.
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
> .java:225)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
> .java:153)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
> .java:145)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
> ct(LifecycleModuleBuilder.java:84)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
> ct(LifecycleModuleBuilder.java:59)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBu
> ild(LifecycleStarter.java:183)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
> eStarter.java:161)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
> java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
> sorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:601)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun
> cher.java:290)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav
> a:230)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La
> uncher.java:409)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:
> 352)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution
> default-c
> li of goal org.apache.tomcat.maven:tomcat7-maven-plugin:2.0-beta-1:run failed.
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
> BuildPluginManager.java:110)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
> .java:209)
> ... 19 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.tomcat.maven.plugin.tomcat7.run.RunMojo.createWebappLoader
> (RunMojo.java:268)
> at
> org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.createCont
> ext(AbstractRunMojo.java:415)
> at
> org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.startConta
> iner(AbstractRunMojo.java:719)
> at
> org.apache.tomcat.maven.plugin.tomcat7.run.AbstractRunMojo.execute(Ab
> stractRunMojo.java:353)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
> BuildPluginManager.java:101)
> ... 20 more
> [ERROR]
> [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
> rea
> d the following articles:
> [ERROR] [Help 1]
> http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutio
> nException
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