My club setup comprises a DJM-A9 and two CDJ-3000s. I'm using HID with the CDJs and my computer is connected directly to the mixer via a high-quality USB cable that I bring with me at every gig.

The USB cables that connect the computer to the CDJs, however, are relatively cheap, long (I think ~3 or 5m each), without a ferite core, and they are mingled with power cables... Those two cables belong to the club, they're not mine.

After almost every gig at that place, my Serato log directory (_Serato_/Logs) gets populated with gigantic, multi-megabyte files containing repeating lines that look like this:


...
I20251228 00:30:43.462329 204353536 :0] [Device] Device name: Pioneer DJ CDJ-3000 Path: DevSrvsID:4294970673 has exceeded the output HID queue threshold.
Output queue threshold is now: 200
ID Count
01 1
02 2
03 2
04 2
...


What's happening under the hood?

I think I had the same issue with the gear we had before the upgrade (DJM-900 and CDJ-2000NXS). The cable situation was identical. Also, this happens regardless of which Serato version I'm using.