Re: 5.1.16 installation
I had a very similar problem to this where the logfile on the mgm node just stopped exactly where yours did (however I can't compare against the other logs you have posted). I had four ndb's and could only get to 2 connect. When i tried to add 4 to the cluster, it would always hang. I kept playing and worked out that one node was messing me up (and often saying it was connected to the cluster, when i don't really think it was!!! I never tested it properly which in hindsight was foolish.). In the end, out of desperation i reinstalled Linux (Fed 6) and Mysql and it worked (reinstalling only Mysql did nothing). I appreciate this is not really any help to you, I'm just sympathising with you and saying how I got round the issue. I am suggesting my problem was down to the OS and not mysql (probably permissions or network/firewall issues). If you have fixed it now, I would be very interested to know what you did!!
Regards
Gordon