Dear Wayne, I had the same error. With your hint, I removed some artifacts carefully and gradually. Finally found that plugin maven:maven-dependency-plugin:1.0 caused the matter. Deleting the plugin would be OK.
Additionally, if I don't specify plugin in POM, and run "mvn dependency:copy-dependencies", Maven will use plugin org.codehaus.mojo:dependency-maven-plugin:1.0. Why Maven chose dependency-maven-plugin, but maven-dependency-plugin, by default? a cup of Java, cheers! Sha Jiang Wayne Fay wrote: > > You can run with mvn -X ...to get more specific debugging information > about what plugin is causing your problems etc. > > However, I'd just delete your local Maven2 repository > (~/.m2/repository) and try again. Maven will automatically download > the files it needs to construct your project. > > I'd suspect that you have simply managed to get a "bad" plugin JAR in > your repo somewhere. Especially given that you're behind a firewall -- > many people attempt to run Maven without configuring things at first > and end up with corrupt JARs etc. Then they realize they need to > configure their firewall proxy and the old corrupt artifacts are still > waiting in your ~/.m2 repo to bite you in the future. > > Wayne > > On 11/3/06, bernulfiskus <[EMAIL PROTECTED]> wrote: >> >> Hi! >> >> I'm new with Maven - i created a simple sample-project, if i compile the >> project i get a nullpointer-Exception! >> I'm behind a firewall, a proxy is configured... >> >> Any Idea? >> >> Bernie >> >> >> [INFO] Building Maven Default Project >> [INFO] task-segment: [compile] >> [INFO] >> ---------------------------------------------------------------------------- >> [DEBUG] maven-resources-plugin: resolved to version 2.2 from repository >> central >> [DEBUG] Retrieving parent-POM: org.apache.maven.plugins:maven-plugins::1 >> for >> project: null:maven-r >> plugin:2.2 from the repository. >> [DEBUG] Retrieving parent-POM: org.apache.maven:maven-parent::1 for >> project: >> org.apache.maven.plug >> 1 from the repository. >> [DEBUG] Retrieving parent-POM: org.apache:apache::1 for project: >> org.apache.maven:maven-parent:pom >> . >> [INFO] >> ------------------------------------------------------------------------ >> [ERROR] FATAL ERROR >> [INFO] >> ------------------------------------------------------------------------ >> [INFO] null >> [INFO] >> ------------------------------------------------------------------------ >> [DEBUG] Trace >> java.lang.NullPointerException >> at >> org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292) >> >> >> -- >> View this message in context: >> http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7156625 >> Sent from the Maven - Users mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Nullpointer-Exception-addPlugin-tf2567630s177.html#a7519773 Sent from the Maven - Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
