Based on the documentation, these are the definition given to each 3 (FD_SOCK_, FD_ALL, VERIFY_SUSPECT).
Their behavior seems to overlap each other, yet do things slightly different.
The one missing topic within the documentation is WHEN to specifically use each one, a combination of more than one or all three together.
This post was found : Do we need both FD_SOCK and FD_ALL in JGroups UDP Configuration? which provided a nice answer at the bottom and is a start to answering this question but does fall a bit short.
Are there any notes or feedback related to WHEN specifically use each one, a combination of more than one or all three together?