Have fun.....
[13:14:02] [Server thread/INFO]: Mr_Killer01 joined the game
[13:15:25] [Server thread/INFO]: Mr_Killer01 lost connection: Disconnected
[13:16:25] [Server Watchdog/FATAL]: A single server tick took 60.00 seconds (should be max 0.05)
[13:16:28] [Server thread/INFO]: Mr_Killer01 left the game
[13:16:28] [Server Watchdog/FATAL]: Considering it to be crashed, server will forcibly shutdown.
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Server doesn't crash for me, but seems drastically overloaded. Mob ticks are delayed; they're teleporting instead of moving through the world.
[15:16:09] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 31314ms behind, skipping 626 tick(s)
[15:16:13] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 3883ms behind, skipping 77 tick(s)
[15:16:52] [Server thread/INFO]: Bemoty[/127.0.0.1:61990] logged in with entity id 3534 at (229.5, 67.0, 286.5)
[15:16:52] [Server thread/INFO]: Bemoty joined the game
[15:16:58] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 4355ms behind, skipping 87 tick(s)
[15:17:18] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2271ms behind, skipping 45 tick(s)

Memory: 846033040 bytes (806 MB) / 1042808832 bytes (994 MB) up to 1042808832 bytes (994 MB)
Server ran out of memory. Assign more RAM.

Was that for me? I tested this on an i7 with 16 gigabyte or ram, only one simple freaking server.jar and the normal unchanged version of Minecraft, so, out of memory is something server.jar accomplishes and not my hardware. I keep tabs on the use of memory during these tests, and believe me, there was plenty to use. And if you refer to the other guy? I think he did the same as me, why else does testing for you guys in a crippled system would bring any viable data... This was just a moment in time, and I think that the situation is quit different if I download the server.jar again.... So, from the time I placed my problem, and the answer I gave you now, there could be a few version updates in between. Maybe telling us that instead of barking at my hardware....(No offense, just realistic.😉)

See the duplicated ticket MC-130959