NPE in maven-javadoc-plugin
---------------------------
Key: MNG-809
URL: http://jira.codehaus.org/browse/MNG-809
Project: Maven 2
Type: Bug
Components: maven-plugins
Versions: 2.0-beta-1
Environment: Windows 2k3 SP1. JDK 1.5.0_04
Reporter: md
Attachments: JavadocReport.java
running m2 javadoc:javadoc fails with an NPE:
[ERROR] BUILD ERROR
[INFO]
----------------------------------------------------------------------------
[INFO] Diagnosis: An error has occurred in JavaDocs report generation.
[INFO]
----------------------------------------------------------------------------
[ERROR] Cause:
org.apache.maven.plugin.MojoExecutionException: An error has occurred in
JavaDocs report generation.
at
org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:98)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:346)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:478)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:459)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:441)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:131)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:186)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:316)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
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.reporting.MavenReportException: An error has
occurred in javadoc report generation.
at
org.apache.maven.plugin.javadoc.JavadocReport.executeReport(JavadocReport.java:857)
at
org.apache.maven.plugin.javadoc.JavadocReport.generate(JavadocReport.java:618)
at
org.apache.maven.reporting.AbstractMavenReport.execute(AbstractMavenReport.java:92)
... 16 more
Caused by: java.lang.NullPointerException
at
org.apache.maven.plugin.javadoc.JavadocReport.executeReport(JavadocReport.java:800)
... 18 more
I looked at the source code; looks like the variable doctitle needs to be
initialized with the static variable DEFAULT_DOCTITLE in it's declaration on
line 337 in org.apache.maven.plugin.javadoc.JavadocReport. I tested this fix on
my machine and the NPE went away and the target/javadoc folder appeared.
Attaching the file with the change on line 337.
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