kernel: sonewconn: pcb 0xfffff80203563930: Listen queue overflow: 193

[adrianwi]

I've just started seeing this message on the console and have no idea what it means. Seems to be around every 15 minutes, but not exactly or to any obvious pattern. Any ideas?

Feb 6 18:24:20 freenas1 kernel: sonewconn: pcb 0xfffff80203563930: Listen queue overflow: 193 already in queue awaiting acceptance (1 occurrences)
Feb 6 18:36:18 freenas1 kernel: sonewconn: pcb 0xfffff80203563930: Listen queue overflow: 193 already in queue awaiting acceptance (1 occurrences)

 

[dlavigne]

Something (usually an app/jail) is overflowing the NIC's ability to keep up. This is a good place to start: https://blog.tyk.nu/blog/fun-with-freebsd-listen-queue-overflow/.

 

[delfrogo]

I was having this issue for the last 2 days.

freenas kernel: sonewconn: pcb 0xfffff800bc320cb0: Listen queue overflow: 151 already in queue awaiting acceptance (6 occurrences)

It ended up being my Plex jail. I updated to the latest version, which as of today was 1.14.0.5470, and it fixed my issue.