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https://issues.apache.org/jira/browse/CXF-5287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770632#comment-13770632
 ] 

Nickolay Martinov edited comment on CXF-5287 at 9/18/13 10:20 AM:
------------------------------------------------------------------

Attached patch to be prepared for partially constructed state as switch is 
inside try.
                
      was (Author: nickolay_martinov):
    Patch to be prepared for partially constructed state as switch is inside 
try.
                  
> NPE at org.apache.cxf.maven_plugin.ClassLoaderSwitcher.restoreClassLoader
> -------------------------------------------------------------------------
>
>                 Key: CXF-5287
>                 URL: https://issues.apache.org/jira/browse/CXF-5287
>             Project: CXF
>          Issue Type: Bug
>          Components: Tooling
>    Affects Versions: 2.7.6
>            Reporter: Nickolay Martinov
>            Priority: Minor
>              Labels: patch
>         Attachments: CXF-5287-fix.patch
>
>
> Maven plugin throws exception when running build.
> {noformat}
> Failed to execute goal org.apache.cxf:cxf-java2ws-plugin:2.7.6:java2ws 
> (Generate UtafService.wsdl) on project temip-ca-alarms-from-temip-utaf-bc: 
> Execution Generate UtafService.wsdl of goal 
> org.apache.cxf:cxf-java2ws-plugin:2.7.6:java2ws failed. NullPointerException 
> -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute 
> goal org.apache.cxf:cxf-java2ws-plugin:2.7.6:java2ws (Generate 
> UtafService.wsdl) on project temip-ca-alarms-from-temip-utaf-bc: Execution 
> Generate UtafService.wsdl of goal 
> org.apache.cxf:cxf-java2ws-plugin:2.7.6:java2ws failed.
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
>       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:84)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
>       at 
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
>       at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
>       at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
>       at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
>       at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
>       at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
>       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:597)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
>       at 
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
> Caused by: org.apache.maven.plugin.PluginExecutionException: Execution 
> Generate UtafService.wsdl of goal 
> org.apache.cxf:cxf-java2ws-plugin:2.7.6:java2ws failed.
>       at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
>       at 
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
>       ... 19 more
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.cxf.maven_plugin.ClassLoaderSwitcher.restoreClassLoader(ClassLoaderSwitcher.java:120)
>       at org.apache.cxf.maven_plugin.Java2WSMojo.execute(Java2WSMojo.java:233)
>       at 
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
>       ... 20 more
> {noformat}
> According to source it fails when it tries to restore system properties. This 
> can only happen when switchClassLoader() was never called.

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