One obvious problem I can tell is
you should use
Could you change it and do a quick test again?
I try, but nothing has changed; error still remain....
1) In bundle export, I removed Export-Package tags from maven-bundle-plugin configuration (by default, all packages that are not defined in Provate-Package tags are exported)
2) In bundle import, there is no need to specify import packages, they are automatically available from all other bundles.
After these changes, I re-build both bundles and it works: I can use exported packages from bundle1 (osgi-export-sample1) into bundle2 (osgi-import-sample1).
Note: I notice that sometimes, in eclipse, it is necessary to "Update Project Configuration" to make changes works (see screenshot).
I attach the updated bundles, hope this can help someone.