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
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