Invalid default for field warning message coming from Avro?

[Check Peck <co...@gmail.com>]

I have a avro schema like this in which I have `is_userid_present` decalred
as boolean and I wanted to give default value as false to it so I came up
with below avro schema.

    {
       "type":"record",
       "name":"hello",
       "fields":[
          {
             "name":"u",
             "type":[
                "string",
                "null"
             ]
          },
          {
             "name":"p",
             "type":"string"
          },
          {
             "name":"bu",
             "type":"boolean"
          },
          {
             "name":"is_userid_present",
             "type":"boolean",
             "default":"false"
          }
       ]
    }

But from Avro code, I am seeing this warning message -

    [WARNING] Avro: Invalid default for field is_userid_present: "false"
not a "boolean"

I am not sure what wrong I am doing here? If I have avro schema like this,
then will it be of any problem for writing and reading the data?

Re: Invalid default for field warning message coming from Avro?

[Joey Echeverria <jo...@cloudera.com>]

The default should be specified using the JSON type. So for boolean,
you want false without the quotes. As is, it thinks you're trying to
set the default to a string.

This is described under the definition of record schemas in the spec:

http://avro.apache.org/docs/current/spec.html#schema_record

The table with example defaults should help as well.

-Joey

On Mon, Jan 5, 2015 at 4:46 PM, Check Peck <co...@gmail.com> wrote:
> I have a avro schema like this in which I have `is_userid_present` decalred
> as boolean and I wanted to give default value as false to it so I came up
> with below avro schema.
>
>     {
>        "type":"record",
>        "name":"hello",
>        "fields":[
>           {
>              "name":"u",
>              "type":[
>                 "string",
>                 "null"
>              ]
>           },
>           {
>              "name":"p",
>              "type":"string"
>           },
>           {
>              "name":"bu",
>              "type":"boolean"
>           },
>           {
>              "name":"is_userid_present",
>              "type":"boolean",
>              "default":"false"
>           }
>        ]
>     }
>
> But from Avro code, I am seeing this warning message -
>
>     [WARNING] Avro: Invalid default for field is_userid_present: "false" not
> a "boolean"
>
> I am not sure what wrong I am doing here? If I have avro schema like this,
> then will it be of any problem for writing and reading the data?



-- 
Joey Echeverria