The fourohfour tool responsible for serving Toolforge 404 pages has been timing out recently with errors that look like this:
Wed Jul 13 12:48:23 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:26 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:27 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:28 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:29 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:30 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:31 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:32 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:33 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:34 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:35 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:36 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:37 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:38 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:39 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:39 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) *** Wed Jul 13 12:48:40 2022 - *** uWSGI listen queue of socket ":8000" (fd: 4) full !!! (101/100) ***