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Michael Osipov commented on MCHECKSTYLE-287: -------------------------------------------- Something seems to be wrong here: {noformat} PS D:\Entwicklung\Projekte\mcheckstyle-287-demo> mvn clean install [INFO] Scanning for projects... [WARNING] The project mcheckstyle-issue-287:parent:pom:1.0-SNAPSHOT uses prerequisites which is only intended for maven-plugin projects but not for non maven-plugin projects. For such purposes you should use the maven-enforcer-plugin. See https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html [INFO] ------------------------------------------------------------------------ [INFO] Reactor Build Order: [INFO] [INFO] Reproduce issue MCHECKSTYLE-287 [INFO] Custom checkstyle rules [INFO] Dummy project code [INFO] [INFO] ------------------------------------------------------------------------ [INFO] Building Reproduce issue MCHECKSTYLE-287 1.0-SNAPSHOT [INFO] ------------------------------------------------------------------------ [INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ parent --- [INFO] [INFO] --- maven-checkstyle-plugin:2.17:check (checkstyle-validation) @ parent --- [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] Reproduce issue MCHECKSTYLE-287 .................... FAILURE [ 0.531 s] [INFO] Custom checkstyle rules ............................ SKIPPED [INFO] Dummy project code ................................. SKIPPED [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 0.630 s [INFO] Finished at: 2017-06-25T11:21:30+02:00 [INFO] Final Memory: 9M/241M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (checkstyle-validation) on project parent: Execution checkstyle-validation of goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check failed: Plugin org.apache.maven.plugins:maven-checkstyle-plugin:2.17 or one of its dependencies could not be resolved: Failure to find mcheckstyle-issue-287:csrules:jar:1.0-SNAPSHOT in http://repository.apache.org/snapshots was cached in the local repository, resolution will not be reattempted until the update interval of apache.snapshots has elapsed or updates are forced -> [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/PluginResolutionException {noformat} > checkstyle report throws NPE > ---------------------------- > > Key: MCHECKSTYLE-287 > URL: https://issues.apache.org/jira/browse/MCHECKSTYLE-287 > Project: Maven Checkstyle Plugin > Issue Type: Bug > Affects Versions: 2.13, 2.14 > Reporter: Thomas Scheffler > Attachments: mcheckstyle-287-demo.tgz, patch1.diff, projects.tar.gz > > > I don't know what triggers this bug. Somehow > org.apache.maven.plugin.checkstyle.AbstractCheckstyleReport.collectArtifacts(String) > produces a List which contains the null object. And therefor an exception is > thrown here (2.14): > {noformat} > [ERROR] Failed to execute goal > org.apache.maven.plugins:maven-site-plugin:3.3:site (default-site) on project > oaipmh: Execution default-site of goal > org.apache.maven.plugins:maven-site-plugin:3.3:site failed. > NullPointerException -> [Help 1] > org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute > goal org.apache.maven.plugins:maven-site-plugin:3.3:site (default-site) on > project oaipmh: Execution default-site of goal > org.apache.maven.plugins:maven-site-plugin:3.3:site failed. > at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:224) > 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.buildProject(LifecycleModuleBuilder.java:116) > at > org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80) > at > org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) > at > org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120) > at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355) > at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155) > at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584) > at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216) > at org.apache.maven.cli.MavenCli.main(MavenCli.java:160) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:606) > at > org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) > at > org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) > at > org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) > at > org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356) > Caused by: org.apache.maven.plugin.PluginExecutionException: Execution > default-site of goal org.apache.maven.plugins:maven-site-plugin:3.3:site > failed. > at > org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:143) > at > org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208) > ... 19 more > Caused by: java.lang.NullPointerException > at > org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.configureResourceLocator(DefaultCheckstyleExecutor.java:852) > at > org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.executeCheckstyle(DefaultCheckstyleExecutor.java:102) > at > org.apache.maven.plugin.checkstyle.AbstractCheckstyleReport.executeReport(AbstractCheckstyleReport.java:474) > at > org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:156) > at > org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:255) > at > org.apache.maven.plugins.site.ReportDocumentRenderer.renderDocument(ReportDocumentRenderer.java:219) > at > org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:319) > at > org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:135) > at > org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:175) > at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:138) > at > org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132) > ... 20 more > {noformat} > Looking at the code, you see a null check is done for the list, bit not for > elements of that list: > {noformat} > // MCHECKSTYLE-225: load licenses from additional artifacts, not from > classpath > if ( additionalArtifacts != null ) > { > for ( Artifact licenseArtifact : additionalArtifacts ) > { > try > { > resourceManager.addSearchPath( "jar", "jar:" + > licenseArtifact.getFile().toURI().toURL() ); > } > catch ( MalformedURLException e ) > { > // noop > } > } > } > {noformat} -- This message was sent by Atlassian JIRA (v6.4.14#64029)