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How to fix error "Updating Maven Project". Unsupported IClasspathEntry kind=4?

I have imported maven project in STS, when I run update update project I receive:

"Updating Maven Project". Unsupported IClasspathEntry kind=4

Is there a workaround for this?

Solution

  • This issue has been fixed in m2e 1.5.0 which is available for Eclipse Kepler (4.3) and Luna (4.4)

    Please see https://bugs.eclipse.org/bugs/show_bug.cgi?id=374332#c14

    The problem is caused by the fact that STS (the Spring IDE/Eclipse), as well Eclipse and other Eclipse based IDE's, use the m2e(clipse) plugin but that eclipse:eclipse has been probably been run on the project. When m2e encounters a "var" .classpath entry, it throws this error.

    The update sites are specified at the following url:
    http://eclipse.org/m2e/m2e-downloads.html

    If you can't use m2e 1.5.0 for any reason, then :

    1. Disable the maven nature for the project (via the right-click menu)

    2. Run mvn eclipse:clean (while your project is open in STS/eclipse). Depending on the timing, you might need to do a refresh or two on the project before re-enabling the maven nature. You should be able to see that your project has lost it's Maven nature. (The eclipse:clean goal just deletes the .project, .classpath and .settings/ files/directories. You can also just remove those files (again while the project is open) instead of running mvn eclipse:clean.)

    3. Re-enable the maven nature.
      (Most of the time, this can be done by right-clicking on the project in question in the package explorer pane, and then choosing 'Configure'-> 'Convert to Maven Project')