Multiple BindIp in MongoDB 3.4.1 on Debian Jessie I just upgraded from MongoDB 3.2 to 3.4.1.

/etc/mongod.conf had a multiple BindIP:

bindIp: [127.0.0.1,192.168.20.1]


This is not working anymore.
I get this error :

Scalar option 'net.bindIp' must be a single value


According to the documentation, It must be correct :
https://docs.mongodb.com/manual/reference/configuration-options/#net.bindIP

Any idea ?
Remove []. so solution is: bindIp: 127.0.0.1,192.168.20.1 and remember, no space characters anywhere in that string.