Hi everyone.
I am working with ServiceMix ESB and for that i need maven configured on my
system.
I work behind a proxy so i did the proxy settings in settings.xml file in
${Maven_Home}/conf/settings.xml.
But when i run the command mvn jetty:run or for that matter mvn install for
a pom.xml file, then i get the following exception:

[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'jetty'.
[INFO] org.apache.maven.plugins: checking for updates from central
[WARNING] repository metadata for: 'org.apache.maven.plugins' could not be
retrieved from repository: central due to an error: Error transferring file
[INFO] Repository 'central' will be blacklisted
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
------------------------------------------------------------------------
[INFO] The plugin 'org.apache.maven.plugins:maven-jetty-plugin' does not
exist or no valid version could be found
[INFO]
------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: The plugin
'org.apache.maven.plugins:maven-jetty-plugin' does not exist or no valid
version could be found
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1281)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1517)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.segmentTaskListByAggregationNeeds(DefaultLifecycleExecutor.java:381)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:135)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:256)
        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.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.version.PluginVersionNotFoundException:
The plugin 'org.apache.maven.plugins:maven-jetty-plugin' does not exist or
no valid version could be found
        at
org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:226)
        at
org.apache.maven.plugin.version.DefaultPluginVersionManager.resolvePluginVersion(DefaultPluginVersionManager.java:87)
        at
org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:158)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1252)
        ... 14 more
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 43 seconds
[INFO] Finished at: Wed Oct 07 15:28:47 IST 2009
[INFO] Final Memory: 1M/4M
[INFO]
------------------------------------------------------------------------

Do I have to do some other configurations?? 
Please help me out...
Thanks in advance for any help.

Regards,
Anushree
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