Martin Böhm created MECLIPSE-738:
------------------------------------
Summary: NullPointerException in LinkedResource if <locationURI>
is present in .project
Key: MECLIPSE-738
URL: https://jira.codehaus.org/browse/MECLIPSE-738
Project: Maven 2.x Eclipse Plugin
Issue Type: Bug
Affects Versions: 2.9
Reporter: Martin Böhm
Priority: Trivial
Attachments: linkedResourceProblem.zip
I get a reproducable NullPointerException if I call eclipse:eclipse on a
project that always has a .project-file that contains links with
<locationURI>-Tags.
{code}
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-eclipse-plugin:2.9:eclipse (default-cli) on
project linkedResourceProblem: Execution def
ault-cli of goal org.apache.maven.plugins:maven-eclipse-plugin:2.9:eclipse
failed. NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal
org.apache.maven.plugins:maven-eclipse-plugin:2.9:eclipse (default-cli)
on project linkedResourceProblem: Execution default-cli of goal
org.apache.maven.plugins:maven-eclipse-plugin:2.9:eclipse 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:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
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
default-cli of goal org.apache.maven.plugins:maven-eclipse-plugin:2.9:eclipse f
ailed.
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.maven.plugin.eclipse.LinkedResource.<init>(LinkedResource.java:131)
at
org.apache.maven.plugin.eclipse.writers.EclipseProjectWriter.write(EclipseProjectWriter.java:154)
at
org.apache.maven.plugin.eclipse.EclipsePlugin.writeConfiguration(EclipsePlugin.java:1232)
at
org.apache.maven.plugin.ide.AbstractIdeSupportMojo.execute(AbstractIdeSupportMojo.java:511)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
... 20 more
{code}
If I change the present <locationURI> to <location> in .project and call
eclipse:eclipse I won't get the error. Also if I call eclipse:clean before
calling eclipse:eclipse the .project file of course gets cleaned and will be
created new, so temporary links get lost unfortunately.
I suppose it has to do with the following lines in
org.apache.maven.plugin.eclipse.LinkedResource and how the locationNode is
retrieved.
{code}
119 Xpp3Dom locationNode = node.getChild( "location" );
120 Xpp3Dom locationURINode = node.getChild( "locationURI" );
{code}
Possible workarounds:
- Call eclipse:clean before and recreate temporary links again.
- Replace all <locationURI> with <location> before calling eclipse:eclipse to
preserve temporary links.
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