Integration

Hi,
I have a WL domain, that consists on a SOA cluster and a OSB cluster. I want to have external cache servers, as it is the preferred option provided by Oracle, so I have external processes which starts a cache, loads data from database, and create a Coherence cluster.
I have tried different options for deployment and havinfg issues with all of them.

In my domain (FMW 11.1.1.6), I have not deployed the coherence libs, as they are included in the server modules. I start the external process, which points to the coherence lib in FMW_MODULES, and load everything. So far so good. When I start the managed servers for OSB cluster and SOA clusters I get a lot of errors, like:

java.lang.IllegalArgumentException: No scheme for cache: "/soa-infra/deployment/members/mydomain_development_soa_cluster"

I don't know if I should create different coherence clusters, one for my apps, and one for built in OSB+SOA functionality, or I could use the same. If I use the same, where should I put cache configurations, and where can I see built in cache definitions.
If I should create a new cluster for my functionality, how could I do it, knowing that I will not be bundling only J2EE apps, but also global libraries, and security providers using these coherence infrastructure.

Do I need activecache for anything?

Documentation is not very clear.

Thanks for your support.