I am running NSClient++, Version: 0.4.4.23 2016-04-05, Platform: w32 across 25 servers and most days I end up with several nscp.exe processes running on each server. When the multiple processes are running, Icinga gets connection refused on all checks.
I have to kill them and restart the NSCP service to get things working again.
Has anyone seen this before or has any ideas what I can check? Updating NSCP might not be an option for a while in this environment.