__System info:__ InfluxDB 1.1.0, CentOS 7
__Steps to reproduce:__
__Expected behavior:__ Successful insert
__Actual behavior:__ ERR: {"error":"unable to parse 'measure,purpose=test value=1i,not_working=null 1481713571901366407': invalid number"}
__Additional info:__
I checked the documentation and as far as I can see, there is no indication that inserting null values should not be working. Even if they shouldn't work, the error message "invalid number" is rather misleading.
null is not a valid field value and is unsupported. There are only 4 field types supported, int64, float64, bool and string. See the line protocol docs for valid syntax for each of those field types.
Ah, you're right. I see it now.
Most helpful comment
nullis not a valid field value and is unsupported. There are only 4 field types supported,int64,float64,boolandstring. See the line protocol docs for valid syntax for each of those field types.