wfevent leaves UDP sockets after the it returns due to event or timeout

Affiliation EPFL/Swiss Plasma Center

Version(s) Affected/Platform(s) RHEL9 - mdsplus-alpha 7.148.2 RHEL7 - mdsplus-stable 7.142.81

Installation Method(s) yum/dnf

Describe the bug

After wfevent/wfeventRaw returns (due to an event or timeout), the UDP socket remains, causing number of sockets/open file descriptors to increase.
This is not an issue for short lived programs, but for long acquisition programs that stay alive for long periods listening events, it can cause hitting limits of number of open files.

For instance in one host I was hit with error

Cannot bind socket        
: Address already in use  
invalid eventid -1

To Reproduce One one terminal

 echo "for (_i=0;_i<1000;_i++) {wfevent('sockettest',,1);}" | tditest

On other terminal show summary of open sockets

watch -n 1 ss -s

or (Assuming there is no other tditest process running)

ls -l /proc/$(pgrep tditest)/fd

Expected behavior After wfevent returns, UDP socket is destroyed

MDSplus / mdsplus