Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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2.17
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None
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None
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None
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OSX El Captain, java 8, maven 3.x, checkstyle 6.19
Description
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:
[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.
My pom config:
<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>