Technical Issue Server crashing randomly

[blake_won]

Once per day at a random time the server would crash on new rounds, here's the crashlog

===================================
   JKA Movie Battles II Crash Log
===================================
Process File Name: openjkded.i386
Process ID: 1260
Signal Code: 0x0000000F
Signal Reason: kill, sigsend or raise
Exception Address: 0x00000647

-----------------------------------
           Register Dump
-----------------------------------
General Purpose & Control Registers:
EAX: 0xFFFFFFFC, EBX: 0x00000050, ECX: 0xFFD50DB0
EDX: 0x00000000, EBP: 0xFFD50E48, EDI: 0xFFD50DA0
EIP: 0xF7FBD079, ESI: 0x00000000, ESP: 0xFFD50D40

-----------------------------------
          Call Stack Trace
-----------------------------------
./MBII/jampgamei386.so(signal_backtrace+0x2a) [0xed1fc3da]
./MBII/jampgamei386.so(Linux_PrintCallStack+0xb7) [0xed1fc4b7]
./MBII/jampgamei386.so(Linux_Handler+0x2e0) [0xed1fcb10]
linux-gate.so.1(__kernel_vsyscall+0x9) [0xf7fbd079]
linux-gate.so.1(__kernel_vsyscall+0x9) [0xf7fbd079]
/lib/i386-linux-gnu/libc.so.6(__select+0x31) [0xf7bfcd21]
.() [0x807cf28]
.() [0x805daeb]
.() [0x804b2dd]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf1) [0xf7b24b41]
.() [0x804b324]

-----------------------------------
           JKA Information
-----------------------------------
Map: mb2_duel_dotf
Gametype: 7
Server Time: 1583075 ms
Map Time: 1583074 ms
Scores: 0 0 (Red,Blue)

Players Count: 1/30
        Slot Name                             Ping                     IP Team

The server has 2 dedicated cores to it and 4 gb of ram, running it on debian linux with Linux OpenJK (2018-11-13)
I don't have logsync on, but there is a console screenshot added in attachments, and accompanying snipped of the log during the crash