Snowflake server died and had to be restarted
I checked the logs, and the only clue I have to this mystery are from /var/log/syslog:
Nov 8 00:53:15 snowflake kernel: [19782731.564416] tor invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_
adj=0
Nov 8 00:53:15 snowflake kernel: [19782731.564494] CPU: 0 PID: 10912 Comm: tor Not tainted 5.4.20 #8
Nov 8 00:53:15 snowflake kernel: [19782731.564536] Call Trace:
Nov 8 00:53:15 snowflake kernel: [19782731.564571] dump_stack+0x66/0x8b
Nov 8 00:53:15 snowflake kernel: [19782731.564603] dump_header+0x42/0x200
Nov 8 00:53:15 snowflake kernel: [19782731.564635] oom_kill_process+0xe9/0x110
Nov 8 00:53:15 snowflake kernel: [19782731.564668] out_of_memory+0xfa/0x4a0
Nov 8 00:53:15 snowflake kernel: [19782731.564701] __alloc_pages_slowpath+0x91c/0xca0
Nov 8 00:53:15 snowflake kernel: [19782731.564740] __alloc_pages_nodemask+0x249/0x280
Nov 8 00:53:15 snowflake kernel: [19782731.564777] pagecache_get_page+0xbb/0x220
Nov 8 00:53:15 snowflake kernel: [19782731.564810] filemap_fault+0x56e/0x860
Nov 8 00:53:15 snowflake kernel: [19782731.564842] ? page_add_file_rmap+0x135/0x170
Nov 8 00:53:15 snowflake kernel: [19782731.564892] ? alloc_set_pte+0x17c/0x5e0
Nov 8 00:53:15 snowflake kernel: [19782731.564929] ? xas_load+0x9/0x80
Nov 8 00:53:15 snowflake kernel: [19782731.564974] ? xas_find+0x192/0x1d0
Nov 8 00:53:15 snowflake kernel: [19782731.565005] ? filemap_map_pages+0x16f/0x360
Nov 8 00:53:15 snowflake kernel: [19782731.565062] __xfs_filemap_fault.constprop.24+0x37/0xc0 [xfs]
Nov 8 00:53:15 snowflake kernel: [19782731.565104] __do_fault+0x4a/0x8e
Nov 8 00:53:15 snowflake kernel: [19782731.565135] __handle_mm_fault+0xbc2/0x1110
Nov 8 00:53:15 snowflake kernel: [19782731.565169] handle_mm_fault+0xe7/0x1d0
Nov 8 00:53:15 snowflake kernel: [19782731.566305] __do_page_fault+0x1f5/0x4c0
Nov 8 00:53:15 snowflake kernel: [19782731.567444] page_fault+0x34/0x40
Nov 8 00:53:15 snowflake kernel: [19782731.568571] RIP: 0033:0x55b72cdd7bd0
Nov 8 00:53:15 snowflake kernel: [19782731.569707] Code: Bad RIP value.
Nov 8 00:53:15 snowflake kernel: [19782731.570796] RSP: 002b:00007ffc9a8864e8 EFLAGS: 00010246
Nov 8 00:53:15 snowflake kernel: [19782731.571875] RAX: 0000000000000004 RBX: 000055b7343027c0 RCX: 0000000000000000
Nov 8 00:53:15 snowflake kernel: [19782731.573130] RDX: 0000000000000001 RSI: 000000005fa7417a RDI: 000055b7343027c0
Nov 8 00:53:15 snowflake kernel: [19782731.574265] RBP: 0000000000000000 R08: 000000005fa7417a R09: 000000005fa805c8
Nov 8 00:53:15 snowflake kernel: [19782731.575437] R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000218
Nov 8 00:53:15 snowflake kernel: [19782731.576585] R13: 000000005fa7417a R14: 0000000000000000 R15: 000055b7343027c0
Nov 8 00:53:15 snowflake kernel: [19782731.577918] Mem-Info:
Nov 8 00:53:15 snowflake kernel: [19782731.579136] active_anon:366133 inactive_anon:16451 isolated_anon:0
Nov 8 00:53:15 snowflake kernel: [19782731.579136] active_file:16 inactive_file:37 isolated_file:0
Nov 8 00:53:15 snowflake kernel: [19782731.579136] unevictable:0 dirty:0 writeback:0 unstable:0
Nov 8 00:53:15 snowflake kernel: [19782731.579136] slab_reclaimable:1604 slab_unreclaimable:10856
Nov 8 00:53:15 snowflake kernel: [19782731.579136] mapped:485 shmem:18773 pagetables:1112 bounce:0
Nov 8 00:53:15 snowflake kernel: [19782731.579136] free:13180 free_pcp:534 free_cma:0
This machine should only run proxies and the bridge, it's possible there's a memory leak somewhere.