Eclipse error: This project needs to migrate WTP metadata

Question

We started a Web Project in Eclipse 3.2 a ways back and we've since upgraded to Eclipse 3.4 but now the Project has the error:

"This project needs to migrate WTP metadata"

We've tried right-clicking and doing the "quick-fix" which is in fact to Migrate WTP Metadata. Unfortunately nothing happens and the error remains.

We can delete that error from the Problems and everything works as it should, however, every time we re-import the project from source control, the error re-appears. Any ideas on how to permanently get rid of this error or how to ACTUALLY migrate WTP metadata?

UPDATE: Everyone, please vote on the answer that works for you rather than adding your own answer that references a previous person's answer.

Answer 1

try adding this line in the .project file

<nature>org.eclipse.wst.common.project.facet.core.nature</nature>

Or refer to this discussion: for instance, make sure there is no duplicate entries in .sessions/org.eclipse.wst.common.component

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As noted in the comment by larf311, the actual answer in this instance was:

delete the ".settings/org.eclipse.wst.common.component" file.

Simple. ;)

Answer 2

For me, none of these worked. The solution for me was deleting the following file while Eclipse was stopped:

/workspace/.metadata/.plugins/org.eclipse.core.resources/.projects/myprojectname/.markers

Answer 3

The above solution works fine but it creeps up again and again. An easier solution is to right click on the concerned project in Eclipse and choose Validate.

Answer 4

I cannot add comments yet, but the "validate" command also get rid of the error for me. In may case, my project is not a WTP project. It is managed / imported by maven. I also didn't have the WST files under .settings.

Answer 5

Removing the .markers file resolved this issue for me. I would upvote that solution, except that I don't have the "reputation" to do so. :(

Answer 6

Delete the project, and check it out of source control

Answer 7

Don't have a .markers file, nor find a "Validate" button. I'm clueless. :-(

Answer 8

what a markers file!? I didn't find it, but I know I hate the unfriendly setting of projects in Eclipse IDE, after the each SVN starting checkout (once a month or three)

Answer 9

I didn't need WTP so I removed all references to WTP in the .project file.

Answer 10

Here is another thing you could try, only this worked for me :(

Go to project properties > Project facets > there tick "Java" and "Utility Module" ... apply This works if your project is referenced from other projects ..otherwise you could play with those options ...see which one works for you.

Answer 11

I use SVN and every time I checkout the project in a new computer I have this problem, the way I fixed is to copy the .settings from the original location to the new folder of the project, of course use validation

Answer 12

Below answer worked for me. "delete the ".settings/org.eclipse.wst.common.component" file."

Answer 13

Use maven ... mvn eclipse:clean ... mvn eclipse:eclipse ... reimport the project

Answer 14

This just means that the project configuration of wtp are old, or there's a conflict between modules. go to Projct ->properties -> project facets. Then click the following: dynamic web project ver 2.5, java 5 or 6 and javascript toolkit (not sure if its necessary). You will notice that there have been changes to .settings file. check in the new changes, and everytime someone checks out the project it should be okay

Answer 15

the

<nature>org.eclipse.wst.common.project.facet.core.nature</nature>

worked. I have no reputation yet for vote.