SSH problems

[koflera]

Recently, I have experienced quite some instabilities with the connection to the server, both on the nodes 81219 and 81340. After some time, the connection started to work again.

What could this be related to? @florian-burger

[florian-burger]

Could you give an approximate time-frame for this behaviour? I in case need to discuss it with colleages from network.

[koflera]

yesterday it happened several times. Once the connection was possible again after a few minutes, another time it took several hours until a connection was possible again.

[florian-burger]

Yesterday at about 10:45 am there was a memory shortage due to a job claiming too much:

9
[Tue Apr  1 10:45:36 2025] Out of memory: Killed process 4056761 (pt_main_thread) total-vm:1256522788kB, anon-rss:1018306268kB, file-rss:56320kB, shmem-rss:0kB, UID:140929 pgtab
[Tue Apr  1 10:45:36 2025] pt_main_thread: page allocation failure: order:0, mode:0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), nodemask=(null),cpuset=user.slice,mems_allowed=0-1
[Tue Apr  1 10:45:36 2025] CPU: 16 PID: 4056981 Comm: pt_main_thread Kdump: loaded Tainted: P        W  OE     -------  ---  5.14.0-503.23.2.el9_5.x86_64 #1
[Tue Apr  1 10:45:36 2025] Hardware name: Supermicro AS -4124GS-TNR/H12DSG-O-CPU, BIOS 2.5 11/02/2022

I think this is related. I am working to reboot the node