[
https://issues.apache.org/jira/browse/MJAVADOC-793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17848313#comment-17848313
]
Gary D. Gregory commented on MJAVADOC-793:
------------------------------------------
Another wrinkle is that modern Javadoc tool versions no longer let you point to
Java 8 and instead issue a warning and replace the link to Java 22 Javadoc (if
you're on Java 22 for example).
> java.lang.NullPointerException: Cannot invoke "String.length()" because
> "text" is null
> --------------------------------------------------------------------------------------
>
> Key: MJAVADOC-793
> URL: https://issues.apache.org/jira/browse/MJAVADOC-793
> Project: Maven Javadoc Plugin
> Issue Type: Bug
> Affects Versions: 3.6.3
> Reporter: Gary D. Gregory
> Priority: Blocker
> Fix For: 3.6.4
>
>
> Plugin throws {{NullPointerException}} when running {{{}javadoc:javadoc{}}}.
> See:
> * Failing PR: https://github.com/apache/commons-compress/pull/528
> * Build log:
> [https://github.com/apache/commons-compress/actions/runs/9113449616/job/25054982405?pr=528]
> Or:
> # git clone [https://gitbox.apache.org/repos/asf/commons-compress.git]
> # git checkout 542cc5a602a9128932e3fb75503383e481141e7e
> # Edit pom.xml and set the parent POM to version 70
> # Run 'mvn javadoc:javadoc' causes:
> {noformat}
> [INFO] --- javadoc:3.6.3:javadoc (default-cli) @ commons-compress ---
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 8.434 s
> [INFO] Finished at: 2024-05-16T09:36:02-04:00
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:javadoc (default-cli) on
> project commons-compress: Execution default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:javadoc failed: Cannot
> invoke "String.length()" because "text" is null -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:javadoc
> (default-cli) on project commons-compress: Execution default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:javadoc failed: Cannot
> invoke "String.length()" because "text" is null
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2
> (MojoExecutor.java:333)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute
> (MojoExecutor.java:316)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:212)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:174)
> at org.apache.maven.lifecycle.internal.MojoExecutor.access$000
> (MojoExecutor.java:75)
> at org.apache.maven.lifecycle.internal.MojoExecutor$1.run
> (MojoExecutor.java:162)
> at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute
> (DefaultMojosExecutionStrategy.java:39)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:159)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:105)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:73)
> at
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
> (SingleThreadedBuilder.java:53)
> at org.apache.maven.lifecycle.internal.LifecycleStarter.execute
> (LifecycleStarter.java:118)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:283)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:226)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:407)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:348)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution
> default-cli of goal
> org.apache.maven.plugins:maven-javadoc-plugin:3.6.3:javadoc failed: Cannot
> invoke "String.length()" because "text" is null
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:133)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2
> (MojoExecutor.java:328)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute
> (MojoExecutor.java:316)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:212)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:174)
> at org.apache.maven.lifecycle.internal.MojoExecutor.access$000
> (MojoExecutor.java:75)
> at org.apache.maven.lifecycle.internal.MojoExecutor$1.run
> (MojoExecutor.java:162)
> at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute
> (DefaultMojosExecutionStrategy.java:39)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:159)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:105)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:73)
> at
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
> (SingleThreadedBuilder.java:53)
> at org.apache.maven.lifecycle.internal.LifecycleStarter.execute
> (LifecycleStarter.java:118)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:283)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:226)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:407)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:348)
> Caused by: java.lang.NullPointerException: Cannot invoke "String.length()"
> because "text" is null
> at org.codehaus.plexus.util.xml.pull.MXSerializer.writeElementContent
> (MXSerializer.java:912)
> at org.codehaus.plexus.util.xml.pull.MXSerializer.text
> (MXSerializer.java:780)
> at
> org.apache.maven.plugins.javadoc.options.io.xpp3.JavadocOptionsXpp3Writer.writeJavadocOptions
> (JavadocOptionsXpp3Writer.java:287)
> at
> org.apache.maven.plugins.javadoc.options.io.xpp3.JavadocOptionsXpp3Writer.write
> (JavadocOptionsXpp3Writer.java:81)
> at
> org.apache.maven.plugins.javadoc.AbstractJavadocMojo.buildJavadocOptions
> (AbstractJavadocMojo.java:6017)
> at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.executeReport
> (AbstractJavadocMojo.java:1870)
> at org.apache.maven.plugins.javadoc.JavadocReport.generate
> (JavadocReport.java:135)
> at org.apache.maven.plugins.javadoc.JavadocReport.doExecute
> (JavadocReport.java:304)
> at org.apache.maven.plugins.javadoc.AbstractJavadocMojo.execute
> (AbstractJavadocMojo.java:1825)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:126)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2
> (MojoExecutor.java:328)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute
> (MojoExecutor.java:316)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:212)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:174)
> at org.apache.maven.lifecycle.internal.MojoExecutor.access$000
> (MojoExecutor.java:75)
> at org.apache.maven.lifecycle.internal.MojoExecutor$1.run
> (MojoExecutor.java:162)
> at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute
> (DefaultMojosExecutionStrategy.java:39)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:159)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:105)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:73)
> at
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
> (SingleThreadedBuilder.java:53)
> at org.apache.maven.lifecycle.internal.LifecycleStarter.execute
> (LifecycleStarter.java:118)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:261)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:173)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:101)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:906)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:283)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:206)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:283)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:226)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:407)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:348)
> {noformat}
> My local env:
> {noformat}
> Apache Maven 3.9.6 (bc0240f3c744dd6b6ec2920b3cd08dcc295161ae)
> Maven home: C:\java\apache-maven-3.9.6
> Java version: 17.0.11, vendor: Eclipse Adoptium, runtime: C:\Program
> Files\Eclipse Adoptium\jdk-17.0.11.9-hotspot
> Default locale: en_US, platform encoding: Cp1252
> OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
> {noformat}
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