Maven is failing to download the tomcat-maven-plugin snapshot

Question

Even after wiping out my settings.xml, I still get this error when trying to use this snapshot dependency. Given the dependency:

Answer 1

I rechecked and, with the following pom fragments:

  ...
  
    
      Codehaus Snapshots
      http://snapshots.repository.codehaus.org/
      
        true
      
      
        true  
      
    
  
  ...
  
    my-webapp
    
      ...
      
        org.codehaus.mojo
        tomcat-maven-plugin
        1.0-SNAPSHOT
      
      ...
    
   ...
  

The SNAPSHOT of the plugin has been downloaded successfully:

$ mvn clean
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building my-webapp Maven Webapp
[INFO]    task-segment: [clean]
[INFO] ------------------------------------------------------------------------
[INFO] snapshot org.codehaus.mojo:tomcat-maven-plugin:1.0-SNAPSHOT: checking for updates from Codehaus Snapshots
[INFO] snapshot org.codehaus.mojo:tomcat-maven-plugin:1.0-SNAPSHOT: checking for updates from maven2-repository.dev.java.net
Downloading: http://snapshots.repository.codehaus.org//org/codehaus/mojo/tomcat-maven-plugin/1.0-SNAPSHOT/tomcat-maven-plugin-1.0-20091222.232027-11.pom
5K downloaded  (tomcat-maven-plugin-1.0-20091222.232027-11.pom)
Downloading: http://snapshots.repository.codehaus.org//org/codehaus/mojo/tomcat-maven-plugin/1.0-SNAPSHOT/tomcat-maven-plugin-1.0-20091222.232027-11.jar
48K downloaded  (tomcat-maven-plugin-1.0-20091222.232027-11.jar)
[INFO] [clean:clean {execution: default-clean}]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 9 seconds
[INFO] Finished at: Wed Jan 06 16:13:28 CET 2010
[INFO] Final Memory: 7M/78M
[INFO] ------------------------------------------------------------------------

It's very weird because I can't see any difference, but things are working as expected. In other words, I can't reproduce...

---

In your local repository, do you have maven-metadata*.xml files in the 1.0-SNAPSHOT directory for the tomcat-maven-plugin artifact? Do they match the ones on the remote server? Do they correctly specify the build number and timestamp?

If they are incorrect locally, running maven with -U might help.

You might also check mvn help:effective-pom and see what Maven thinks the updatePolicy is for snapshots on that repository.

Or maybe just delete your tomcat-maven-plugin artifact from your local repository and try again.

If nothing helps, try to install it manually (download the plugin from the repository and use the mvn install:install-file mojo) or checkout the sources from the VCS and build it locally. But these options are just workarounds, you have a problem somewhere (what version of maven are you using?).