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mojohaus / jaxb2-maven-plugin

JAXB2 Maven Plugin
https://www.mojohaus.org/jaxb2-maven-plugin/
Apache License 2.0
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NullPointerException on AbstractXsdGeneratorMojo.java line 492 #32

Closed luciano-coder closed 9 years ago

luciano-coder commented 9 years ago

On 2.2 i'm getting a NullPointerException on line 492 in AbstractXsdGeneratorMojo.java.

[ERROR] Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:2.2:schemagen (default-cli) on project raiju: Execution default-cli of goal org.codehaus.mojo:jaxb2-maven-plugin:2.2:schemagen failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:jaxb2-maven-plugin:2.2:schemagen (default-cli) on project raiju: Execution default-cli of goal org.codehaus.mojo:jaxb2-maven-plugin:2.2:schemagen failed.
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:224)
    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:862)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
    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:497)
    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 default-cli of goal org.codehaus.mojo:jaxb2-maven-plugin:2.2:schemagen failed.
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    ... 20 more
Caused by: java.lang.NullPointerException
    at org.codehaus.mojo.jaxb2.schemageneration.AbstractXsdGeneratorMojo.performExecution(AbstractXsdGeneratorMojo.java:492)
    at org.codehaus.mojo.jaxb2.AbstractJaxbMojo.execute(AbstractJaxbMojo.java:257)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
    ... 21 more

There is no indication of the root cause of this. There is also a pending pull request (done by another member) for this issue.

matthewwerny commented 9 years ago

The fix in question is in the https://github.com/mojohaus/jaxb2-maven-plugin/pull/30 pull request. I am also running into this issue and it makes troubleshooting more exotic use cases of the plugin a bit more on the difficult end of things. Given the obviousness of the problem and the narrow scope of the fix, I would consider it a no brainer when considering whether to merge it and cut a quick dot release. :)

lennartj commented 9 years ago

Nice fix; we can never assume that the cause it set in an Exception.

cyberoblivion commented 8 years ago

It would be really nice to have a release with this fix. I have not been able to upgrade from 1.5 for a long time because I get this exception and have no way to track down the issue.