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  1. Apache NiFi
  2. NIFI-8316

NAR plugin can sometimes encounter NullPointerException because XmlDocumentationWriter passes null instead of empty collections

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.14.0, 1.13.2
    • Component/s: Tools and Build
    • Labels:
      None

      Description

      The following stack trace is seen when doing a maven build of the nifi-system-tests-extensions2-nar:

      [INFO] Found a dependency on version 1.14.0-SNAPSHOT of NiFi API
      [WARNING] Could not generate extensions' documentation
      org.apache.maven.plugin.MojoExecutionException: Failed to create Extension Documentation
          at org.apache.nifi.NarMojo.generateDocumentation (NarMojo.java:608)
          at org.apache.nifi.NarMojo.execute (NarMojo.java:501)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
          at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
          at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
          at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
          at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
          at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
          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:282)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
      Caused by: java.lang.reflect.InvocationTargetException
          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.apache.nifi.NarMojo.writeDocumentation (NarMojo.java:658)
          at org.apache.nifi.NarMojo.writeDocumentation (NarMojo.java:623)
          at org.apache.nifi.NarMojo.generateDocumentation (NarMojo.java:589)
          at org.apache.nifi.NarMojo.execute (NarMojo.java:501)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
          at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
          at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
          at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
          at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
          at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
          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:282)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
      Caused by: java.lang.NullPointerException
          at org.apache.nifi.documentation.xml.XmlDocumentationWriter.writeProperty (XmlDocumentationWriter.java:160)
          at org.apache.nifi.documentation.xml.XmlDocumentationWriter.writeProperties (XmlDocumentationWriter.java:143)
          at org.apache.nifi.documentation.AbstractDocumentationWriter.writeBody (AbstractDocumentationWriter.java:119)
          at org.apache.nifi.documentation.AbstractDocumentationWriter.write (AbstractDocumentationWriter.java:104)
          at org.apache.nifi.documentation.AbstractDocumentationWriter.write (AbstractDocumentationWriter.java:98)
          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.apache.nifi.NarMojo.writeDocumentation (NarMojo.java:658)
          at org.apache.nifi.NarMojo.writeDocumentation (NarMojo.java:623)
          at org.apache.nifi.NarMojo.generateDocumentation (NarMojo.java:589)
          at org.apache.nifi.NarMojo.execute (NarMojo.java:501)
          at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
          at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
          at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
          at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
          at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
          at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
          at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
          at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)
          at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)
          at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)
          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:282)
          at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
          at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
          at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347) 

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              • Assignee:
                markap14 Mark Payne
                Reporter:
                markap14 Mark Payne
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                  Updated:
                  Resolved:

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