The metrics names in MsgStats (and other classes) were changed in an incompatible way: some attributes were renamed, e.g. num_ucast_msgs_sent -> num_ucasts_sent, and some were removed.

This breaks backwards compatibility, as some attributes are accessed programmatically.

Todo:

• Add old attribute names, deprecate them
• Re-add deleted attributes
• Add ManagedAttribute annotations where needed

The 2 commits to look at:

• https://github.com/belaban/JGroups/commit/d31ce13fbb1c397629bd5dc2e09538101cb59828
• https://github.com/belaban/JGroups/commit/523a1dda48b2cbc1a64014918a9e84974135b466