Re: checkstyle problem with maven : Unable to instantiate TreeWalker
Are you using your own custom checks or provide a custom packagenames.xml file? In that case see this page: http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/custom-developed-checkstyle.html Julien Simon wrote: Thanks for the answer. So, I tried maven-checkstyle-plugin 2.2 and it didn't work either, but that's a good beginning to have the correct plugin version... In the xml checkstyle configuration file where modules are defined, i tried to change module name=TreeWalker by module name=com.puppycrawl.tools.checkstyle.TreeWalkerand it now works. I don't really understand why we have to specify the fully qualified name of this class, because it works fine when not using maven. On Wed, Jun 4, 2008 at 11:47 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: The Checkstyle plugin version 2.1 uses Checkstyle 4.1. So you can't use stuff from Checkstyle 4.3 in your Checkstyle configuration. Version 2.2 of the plugin, which is being released as we speak, uses Checkstyle 4.4. Start by giving that version a try. Julien Simon wrote: Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488) at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98) at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:73) ... 18 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize module TreeWalker - Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:165) at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:209) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeCheckstyle(CheckstyleReport.java:723) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:484) ... 20 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:152) at
Re: checkstyle problem with maven : Unable to instantiate TreeWalker
I'm using custom checks, I followed the procedure described on the web link you gave me. Everything now works correctly. Maybe I'm wrong but I think there's a mistake in this documentation: in the pom.xml example, dependencies containing custom developed checks are placed in the build extensions ... /extensions /build section. But when I run maven with my dependencies configured like that, these dependencies are not placed on the classpath and maven can't resolve my custom developed checks. If I place my dependencies containing custom developed checks in the plugin dependencies ... /dependencies /plugin section, it works fine. On Fri, Jun 6, 2008 at 1:54 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: Are you using your own custom checks or provide a custom packagenames.xml file? In that case see this page: http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/custom-developed-checkstyle.html Julien Simon wrote: Thanks for the answer. So, I tried maven-checkstyle-plugin 2.2 and it didn't work either, but that's a good beginning to have the correct plugin version... In the xml checkstyle configuration file where modules are defined, i tried to change module name=TreeWalker by module name=com.puppycrawl.tools.checkstyle.TreeWalkerand it now works. I don't really understand why we have to specify the fully qualified name of this class, because it works fine when not using maven. On Wed, Jun 4, 2008 at 11:47 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: The Checkstyle plugin version 2.1 uses Checkstyle 4.1. So you can't use stuff from Checkstyle 4.3 in your Checkstyle configuration. Version 2.2 of the plugin, which is being released as we speak, uses Checkstyle 4.4. Start by giving that version a try. Julien Simon wrote: Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488) at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98) at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:73) ... 18
Re: checkstyle problem with maven : Unable to instantiate TreeWalker
Hi You probably still have the old version of that page cached in your browser. A new corrected version of the page was deployed on June 4. Check that the publish date matches. You are correct that your checks should be added as a plugin dependency. Julien Simon wrote: I'm using custom checks, I followed the procedure described on the web link you gave me. Everything now works correctly. Maybe I'm wrong but I think there's a mistake in this documentation: in the pom.xml example, dependencies containing custom developed checks are placed in the build extensions ... /extensions /build section. But when I run maven with my dependencies configured like that, these dependencies are not placed on the classpath and maven can't resolve my custom developed checks. If I place my dependencies containing custom developed checks in the plugin dependencies ... /dependencies /plugin section, it works fine. On Fri, Jun 6, 2008 at 1:54 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: Are you using your own custom checks or provide a custom packagenames.xml file? In that case see this page: http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/custom-developed-checkstyle.html Julien Simon wrote: Thanks for the answer. So, I tried maven-checkstyle-plugin 2.2 and it didn't work either, but that's a good beginning to have the correct plugin version... In the xml checkstyle configuration file where modules are defined, i tried to change module name=TreeWalker by module name=com.puppycrawl.tools.checkstyle.TreeWalkerand it now works. I don't really understand why we have to specify the fully qualified name of this class, because it works fine when not using maven. On Wed, Jun 4, 2008 at 11:47 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: The Checkstyle plugin version 2.1 uses Checkstyle 4.1. So you can't use stuff from Checkstyle 4.3 in your Checkstyle configuration. Version 2.2 of the plugin, which is being released as we speak, uses Checkstyle 4.4. Start by giving that version a try. Julien Simon wrote: Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488)
Re: checkstyle problem with maven : Unable to instantiate TreeWalker
Thanks for the answer. So, I tried maven-checkstyle-plugin 2.2 and it didn't work either, but that's a good beginning to have the correct plugin version... In the xml checkstyle configuration file where modules are defined, i tried to change module name=TreeWalker by module name=com.puppycrawl.tools.checkstyle.TreeWalkerand it now works. I don't really understand why we have to specify the fully qualified name of this class, because it works fine when not using maven. On Wed, Jun 4, 2008 at 11:47 PM, Dennis Lundberg [EMAIL PROTECTED] wrote: The Checkstyle plugin version 2.1 uses Checkstyle 4.1. So you can't use stuff from Checkstyle 4.3 in your Checkstyle configuration. Version 2.2 of the plugin, which is being released as we speak, uses Checkstyle 4.4. Start by giving that version a try. Julien Simon wrote: Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488) at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98) at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:73) ... 18 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize module TreeWalker - Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:165) at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:209) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeCheckstyle(CheckstyleReport.java:723) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:484) ... 20 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:152) at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:140) ... 23 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalkerCheck
checkstyle problem with maven : Unable to instantiate TreeWalker
Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488) at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98) at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:73) ... 18 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize module TreeWalker - Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:165) at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:209) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeCheckstyle(CheckstyleReport.java:723) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:484) ... 20 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:152) at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:140) ... 23 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalkerCheck at com.puppycrawl.tools.checkstyle.PackageObjectFactory.doMakeObject(PackageObjectFactory.java:94) at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:149) ... 24 more
Re: checkstyle problem with maven : Unable to instantiate TreeWalker
The Checkstyle plugin version 2.1 uses Checkstyle 4.1. So you can't use stuff from Checkstyle 4.3 in your Checkstyle configuration. Version 2.2 of the plugin, which is being released as we speak, uses Checkstyle 4.4. Start by giving that version a try. Julien Simon wrote: Hi, I'm trying to integrate a checkstyle report in a maven project, but I'm facing a problem. The checkstyle report is based on a custom checkstyle check module I developed. I'm using maven 2.0.9, maven-checkstyle-plugin 2.1, and checkstyle 4.3 When I execute mvn checkstyle:checkstyle or mvn site, I get the following exception. I don't really understand why the TreeWalker can't be instantiated. Any help would be great! [ERROR] BUILD ERROR [INFO] [INFO] An error has occurred in Checkstyle report generation. Embedded error: Failed during checkstyle configuration Unable to instantiate TreeWalkerCheck [INFO] [DEBUG] Trace org.apache.maven.lifecycle.LifecycleExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:583) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129) at org.apache.maven.cli.MavenCli.main(MavenCli.java:287) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:615) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.plugin.MojoExecutionException: An error has occurred in Checkstyle report generation. at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:79) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558) ... 16 more Caused by: org.apache.maven.reporting.MavenReportException: Failed during checkstyle configuration at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:488) at org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98) at org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:73) ... 18 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize module TreeWalker - Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:165) at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:209) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeCheckstyle(CheckstyleReport.java:723) at org.apache.maven.plugin.checkstyle.CheckstyleReport.executeReport(CheckstyleReport.java:484) ... 20 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalker at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:152) at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:140) ... 23 more Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate TreeWalkerCheck at com.puppycrawl.tools.checkstyle.PackageObjectFactory.doMakeObject(PackageObjectFactory.java:94) at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:149) ... 24 more -- Dennis Lundberg - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
