Submit server.properties to server, then 'Can't connect to server'.

[tommyleung2020]

I want to change online-mode to false.

In my git repository have this three file:
/eula.txt
/requirements.txt
/server.properties

And server.properties content like this:
（I just follow by server console -> ~/server.properties）

#Minecraft server properties
#Mon Apr 20 14:07:49 UTC 2020
spawn-protection=16
max-tick-time=60000
query.port=25565
generator-settings=
force-gamemode=false
allow-nether=true
enforce-whitelist=false
gamemode=survival
broadcast-console-to-ops=true
enable-query=false
player-idle-timeout=0
difficulty=easy
broadcast-rcon-to-ops=true
spawn-monsters=true
op-permission-level=4
pvp=true
snooper-enabled=true
level-type=default
hardcore=false
enable-command-block=false
network-compression-threshold=256
max-players=20
max-world-size=29999984
resource-pack-sha1=
rcon.port=25575
server-port=25566
server-ip=
spawn-npcs=true
allow-flight=false
level-name=world
view-distance=10
resource-pack=
spawn-animals=true
white-list=false
rcon.password=
generate-structures=true
online-mode=false
max-build-height=256
level-seed=
prevent-proxy-connections=false
use-native-transport=true
motd=A Minecraft Server
enable-rcon=false

Minecraft version 1.14.3
In the minecraft server list of my server column, it show 'Can't connect to server'.

Heroku server log:

app[web.1]: t=2020-04-20T15:18:12+0000 lvl=dbug msg="dial private connection" id=1bbcc9d547e2 typ=proxy addr=localhost:25566 err="dial tcp 127.0.0.1:25566: connect: connection refused"
app[web.1]: t=2020-04-20T15:18:12+0000 lvl=warn msg="failed to open private leg" id=1bbcc9d547e2 typ=proxy privaddr=localhost:25566 err="dial tcp 127.0.0.1:25566: connect: connection refused"

[ghost]

make online-mode true not false

[Bryzizzle]

You can keep online-mode false (I supposed to make a cracked server). But it's best to remove all the configs you don't need. It seems that you only modified the online-mode setting so all your config file needs to be is this:

#Minecraft server properties
#Mon Apr 20 14:07:49 UTC 2020
online-mode=false

The entire config file will then be rebuilt by the Minecraft server when it runs. Pay attention to the new-line at the end of the file as the build pack seems to append its own port (25566 instead of 25565) to the file without adding a new line character /n.

So essentially just add the configs you need to the server properties file and make sure to add a new line to the end of it