Duplicated source folder in Eclipse Project Explorer

[KFDing]

Hi Stefan,

with Project Explorer, I get duplicated source folder shown in the following graph

It is the similar problem like this one
https://stackoverflow.com/questions/25318924/duplicate-src-packages-when-importing-an-existing-project-in-eclipse

Some think it fine to have troubles only with view. But at my side, I find out that the two source folders are not sync. When I want to add one package, or KNIME node extension, it goes only to one folder. Kind of weired.
Have you ever met this problem?? IF so, how to solve it??
Regards
Kefang

[sverhoeven]

The top one is in the Java class path. The bottom one contains non-java files. So they are a view on the same folder on disk.

[KFDing]

Hi Stefan,
if they point to the same folder on disk, how to syn them?? When I want to create one package or KNIME node wizards into one package, it goes to the bottom src, but doesn't show above.
Regards
Kefang