We are using jGroups a lot in our applications. Mixture of logical names (host+number) and UUIDs appears in a view addresses some time when we restart some group members. At some point, the view for one member is
[dev-zhaoa-48631|22] [dev-zhaoa-48631, dev-zhaoa-14374, dev-zhaoa-45685]
but for another member, it is
[dev-zhaoa-48631|23] [dev-zhaoa-48631, fb564aa3-5328-569b-ff3f-84de4a6323c3, d38da714-6217-b59f-e80c-7904b047b875, dev-zhaoa-50510]

I tried to catch the exact scenario to reproduce this, but it is difficult when I try it on purpose. But this happens quite often. I'll try to add more information here.

Thank you very much for look into the problem.