Bedrock server aborts at start:
~ $ ./bedrock_server NO LOG FILE! - setting up server logging... [2019-04-06 19:27:55 INFO] Starting Server [2019-04-06 19:27:55 INFO] Version 1.10.0.7 [2019-04-06 19:27:55 INFO] Level Name: Bedrock level [2019-04-06 19:27:55 INFO] Game mode: 0 Survival [2019-04-06 19:27:55 INFO] Difficulty: 1 EASY [2019-04-06 19:27:59 INFO] IPv4 supported, port: 0 [2019-04-06 19:27:59 INFO] IPv6 supported, port: 0 [2019-04-06 19:27:59 ERROR] Network port occupied, can't start server. Quit correctly
Snippet of the strace below. ipv6 was disabled on this system, other daemons including OpenVPN bind to UDP ports without issue
bind(7<UDP:[22049]>, {sa_family=AF_INET, sin_port=htons(19132), sin_addr=inet_addr("0.0.0.0")}, 16) = 0
setsockopt(7<UDP:[22049]>, SOL_SOCKET, SO_RCVBUF, [262144], 4) = 0
setsockopt(7<UDP:[22049]>, SOL_SOCKET, SO_LINGER, {l_onoff=0, l_linger=0}, 8) = 0
setsockopt(7<UDP:[22049]>, SOL_SOCKET, SO_SNDBUF, [16384], 4) = 0
setsockopt(7<UDP:[22049]>, SOL_SOCKET, SO_BROADCAST, [1], 4) = 0
getsockname(7<UDP:[22049]>, {sa_family=AF_INET, sin_port=htons(19132), sin_addr=inet_addr("0.0.0.0")}, [128->16]) = 0
setsockopt(7<UDP:[22049]>, SOL_IP, IP_HDRINCL, [0], 4) = -1 ENOPROTOOPT (Protocol not available)
getsockname(7<UDP:[22049]>, {sa_family=AF_INET, sin_port=htons(19132), sin_addr=inet_addr("0.0.0.0")}, [128->16]) = 0
sendto(7<UDP:[22049]>, "\0\0\0\0", 4, 0, {sa_family=AF_INET, sin_port=htons(19132), sin_addr=inet_addr("127.0.0.1")}, 16) = 4
socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP) = -1 EAFNOSUPPORT (Address family not supported by protocol)
close(7<UDP:[22049]>) = 0
write(1</dev/pts/0<char 136:0>>, "[2019-04-06 19:23:51 INFO] IPv4 "..., 51[2019-04-06 19:23:51 INFO] IPv4 supported, port: 0
) = 51
write(3</home/minecraft/Debug_Log.txt>, "[2019-04-06 19:23:51 INFO] IPv4 "..., 51) = 51
write(1</dev/pts/0<char 136:0>>, "[2019-04-06 19:23:51 INFO] IPv6 "..., 51[2019-04-06 19:23:51 INFO] IPv6 supported, port: 0
) = 51
write(3</home/minecraft/Debug_Log.txt>, "[2019-04-06 19:23:51 INFO] IPv6 "..., 51) = 51
fcntl(4</home/minecraft/worlds/Bedrock level/db/LOCK>, F_SETLK, {l_type=F_UNLCK, l_whence=SEEK_SET, l_start=0, l_len=0}) = 0
close(4</home/minecraft/worlds/Bedrock level/db/LOCK>) = 0
close(6</home/minecraft/worlds/Bedrock level/db/MANIFEST-000033>) = 0
close(5</home/minecraft/worlds/Bedrock level/db/000035.log>) = 0
munmap(0x7f4830a67000, 190) = 0
munmap(0x7f4830a3b000, 190) = 0
write(1</dev/pts/0<char 136:0>>, "[2019-04-06 19:23:51 ERROR] Netw"..., 71[2019-04-06 19:23:51 ERROR] Network port occupied, can't start server.
) = 71
write(3</home/minecraft/Debug_Log.txt>, "[2019-04-06 19:23:51 ERROR] Netw"..., 71) = 71
munmap(0x7f482dc28000, 299008) = 0