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I have a parent Maven project (using java facet version 1.7) which includes some modules. I got the following warning from Eclipse Juno SR1:
Implementation of project facet java could not be found. Functionality will be limited (Unknown Faceted Project Problem)
How can I get rid of this error? Quick fix didn't found anything. Interestingly, I do not have Project Facet entry in the Project properties dialog.
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Right click project -> Project Natures -> search for 'Eclipse faceted Project Properties' -> Remove -> Apply and close.
To edit a project's facets, select Project > Properties > Project Facets. Facets have version numbers. Not all facet version numbers can be changed (e.g., a facet available in only one version of software can not have other version numbers).
Before exporting the jar file from eclipse select the version 1.6 or 1.7 rather than 1.8. Please follow the below steps: (i) Right Click on project and go to "Properties". (ii) Now Select "Java Compiler" and uncheck use compliance from execution.
This occurs when you upgrade your IDE or open a project from older IDE into a new one.
To solve (remove the unsupported facet):
After all done, you may, if not done yet, mark the correct facet to your project to work.
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Just delete the file
org.eclipse.wst.common.project.facet.core.xml
in the .settings folder.
It worked for me .
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