Recovering from an invalid state in m2eclipse
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On rare occasions, your projects may get into an invalid state. When this happens, you may notice one or more of the following symptoms:
- Inability to run the project on the server.
- Inability to build the project.
- Unexpected error messages.
This generally happens when something causes the Maven-related metadata in m2eclipse to get into an invalid state. There are a few things you can try to resolve this:
- Ensure all necessary projects are opened in the workspace (ie, web and deploy projects)
- Refresh all affected projects (right-click > Refresh on a project or group of projects)
- Clean all affected projects (Project > Clean...)
- Update Maven configuration for affected projects (Right-click on a project > Maven > Update Project configuration)
If those fail to resolve the issue, your next step should be to create a new workspace (File > Switch Workspace) and then re-checkout the projects from source control. If this fails to get your project into a good state, post on the forums or come talk to a member of the Java Stack team.