Plutonium

JezuzLizard Thanks for the explanation and letting me know that I'm not the only one who is facing such issue.
A quick question: As you stated that many server owners have this issue, are they using Linux or windows? In the beginning, I did start with a windows server (apparently ran it for a day or two), although I didn't had much time to track it but if I am not wrong such issue didn't show up.
Later in order to save some bucks, I had to switch to linux.

Resxt No, just the bare server without any script or IW4MAdmin.
Earlier was running on 3 maps and later today same thing happened. More surprisingly, even if the server is not showing up or running, the processes are showing up in the back. (did "top" in linux and shared the screenshot)
Log file is not of help again as it shows nothing when are where the server has crashed or any error.

*Meanwhile as stated by you, I'm going to keep the server running with 1 single map and check out the output.

Log: https://pastebin.com/7mCWBQNs
Top: https://ibb.co/3h4Rw5y
Console: https://ibb.co/xstqgqZ (did status to check but does not responds, only shows heartbeat successful....)

P.S:

Some more details:

dedicated.cfg: https://pastebin.com/C2R4n8W3
tdm.cfg: https://pastebin.com/1cLDh90m
T6server.sh: https://pastebin.com/kyyep9Jm
Console output when I start the server: https://pastebin.com/w6wwqmLa

Xerxes Hey! Thanks for responding!
Previously I didn't change the map rotation but later when I discovered that the server isn't responding, I only have it set to 3 maps (I thought maybe any DLC is missing), but it's not the case. Even the server once stopped responding when I have only 3 maps set.
Unfortunately as it occurs at random times I am not able to figure it out and completely relying on the log to check for any errors.
Log file shows no error or any issues...

OS Version: Ubuntu 20
Server version: Latest
Server Type : TDM

I've hosted a server using ubuntu. In the beginning the server was running fine (even ran for more than 12 hours and atleast 10+ players played without any issues) but later I discovered that the server won't show up in the server list nor can be connected manually.
I can find that in console it shows that "Heartbeat successful and sending heartbeat" but when I type status nothing shows up.

Log file is not of much help as I didn't find any error in it.

So if anyone is aware of what can lead to such issue?