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From "James Short (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MCHECKSTYLE-333) Intermittent NPE on checkstyle:check
Date Fri, 13 Jan 2017 21:03:26 GMT

    [ https://issues.apache.org/jira/browse/MCHECKSTYLE-333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15822339#comment-15822339
] 

James Short commented on MCHECKSTYLE-333:
-----------------------------------------

Note that if I manually run

{code}mvn checkstyle:check{code}

from the cli, it never exhbits this behavior.

> Intermittent NPE on checkstyle:check
> ------------------------------------
>
>                 Key: MCHECKSTYLE-333
>                 URL: https://issues.apache.org/jira/browse/MCHECKSTYLE-333
>             Project: Maven Checkstyle Plugin
>          Issue Type: Bug
>         Environment: OSX El Captain, maven 3.x, maven checkstyle plugin 2.7, checkstyle
6.19
>            Reporter: James Short
>
> I generally run checkstyle:check manually but I wanted to integrate it into the validate
phase of my root build.
> After doing this, it will intermittent fail with an NPE:
> {code}
> [ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check
(checkstyle) on project dropwizard-api: Execution checkstyle of goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check
failed. NullPointerException -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check
(checkstyle) on project dropwizard-api: Execution checkstyle of goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check
failed.
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
> 	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:128)
> 	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
> 	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
> 	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
> 	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
> 	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
> 	at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	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 checkstyle of
goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check failed.
> 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
> 	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
> 	... 20 more
> Caused by: java.lang.NullPointerException
> 	at java.util.zip.ZipFile.getZipEntry(ZipFile.java:566)
> 	at java.util.zip.ZipFile.access$900(ZipFile.java:60)
> 	at java.util.zip.ZipFile$ZipEntryIterator.next(ZipFile.java:524)
> 	at java.util.zip.ZipFile$ZipEntryIterator.nextElement(ZipFile.java:499)
> 	at java.util.zip.ZipFile$ZipEntryIterator.nextElement(ZipFile.java:480)
> 	at java.util.jar.JarFile$JarEntryIterator.next(JarFile.java:257)
> 	at java.util.jar.JarFile$JarEntryIterator.nextElement(JarFile.java:266)
> 	at java.util.jar.JarFile$JarEntryIterator.nextElement(JarFile.java:247)
> 	at org.codehaus.plexus.resource.loader.JarHolder.getEntries(JarHolder.java:132)
> 	at org.codehaus.plexus.resource.loader.JarResourceLoader.loadJar(JarResourceLoader.java:100)
> 	at org.codehaus.plexus.resource.loader.JarResourceLoader.initialize(JarResourceLoader.java:63)
> 	at org.codehaus.plexus.resource.loader.JarResourceLoader.getResource(JarResourceLoader.java:141)
> 	at org.apache.maven.plugin.checkstyle.resource.LicenseResourceManager.getResource(LicenseResourceManager.java:75)
> 	at org.codehaus.plexus.resource.DefaultResourceManager.getResourceAsFile(DefaultResourceManager.java:91)
> 	at org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.getOverridingProperties(DefaultCheckstyleExecutor.java:564)
> 	at org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.getConfiguration(DefaultCheckstyleExecutor.java:379)
> 	at org.apache.maven.plugin.checkstyle.exec.DefaultCheckstyleExecutor.executeCheckstyle(DefaultCheckstyleExecutor.java:217)
> 	at org.apache.maven.plugin.checkstyle.CheckstyleViolationCheckMojo.execute(CheckstyleViolationCheckMojo.java:538)
> 	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
> 	... 21 more
> [ERROR]
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> {code}
> My pom config:
> {code}
>   <plugin>
>                 <groupId>org.apache.maven.plugins</groupId>
>                 <artifactId>maven-checkstyle-plugin</artifactId>
>                 <version>2.17</version>
>                 <configuration>
>                     <configLocation>build-tools/src/main/resources/checkstyle/checkstyle.xml</configLocation>
>                     <includeTestSourceDirectory>true</includeTestSourceDirectory>
>                     <suppressionsLocation>build-tools/src/main/resources/checkstyle/suppressions.xml</suppressionsLocation>
>                     <linkXRef>false</linkXRef>
>                 </configuration>
>                 <executions>
>                     <execution>
>                         <id>checkstyle</id>
>                         <phase>validate</phase>
>                         <goals>
>                             <goal>check</goal>
>                         </goals>
>                         <configuration>
>                             <failOnViolation>true</failOnViolation>
>                             <encoding>UTF-8</encoding>
>                             <consoleOutput>true</consoleOutput>
>                             <failsOnError>true</failsOnError>
>                             <linkXRef>false</linkXRef>
>                         </configuration>
>                     </execution>
>                 </executions>
>                 <dependencies>
>                     <dependency>
>                         <groupId>org.coner</groupId>
>                         <artifactId>build-tools</artifactId>
>                         <version>1.0</version>
>                     </dependency>
>                     <dependency>
>                         <groupId>com.puppycrawl.tools</groupId>
>                         <artifactId>checkstyle</artifactId>
>                         <version>6.19</version>
>                     </dependency>
>                 </dependencies>
>             </plugin>
> {code}



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