BEA-110486 (Transaction BEA1-018F7B9BE9D9B3789CED) cannot complete commit processing because resource [cgDataSource] is unavailable

The error message is:

The solution was very easy, but taked much time to find.
Follow the steps:

1. Stop your server.
2. Go to [your domain]\servers\AdminServer\data\store\default.
3. Delete* _WLS_ADMINSERVER_[random number].DAT
4. Restart server

http://forums.oracle.com/forums/thread.jspa?threadID=692320