1. Create a new Openshift application for example: phptest
2. nested rockmongo-1.1 and mongodb-2.0 to the application of the php type
3. Edit the application and select mongodb-2.0 and rockmongo-1.1 from the embeddable cartridge and click 'Finish'.

Notes:
It has also the same issue for nested rockmongo-1.1 individually.

Actual Result:
It will popup "problem occured" dialog...

Expect Result:
For individually nested rockmongo, it should popup "warning dialog" said that Mongodb must be embedded before rockmongo.
For simultaneously nested mongodb and rockmongo, it should be successful without any error.