Avro evolve failing

Below works when trying to evolve .avsc file: The block highlighted is added. But the same with BIGINT fails.
{
“type” : “record”,
“name” : “county”,
“doc” : “Sqoop import of county”,
“fields” : [ {
“name” : “county_id”,
“type” : [ “null”, “int” ],
“default” : null,
“columnName” : “county_id”,
“sqlType” : “4”
},
{
** “name” : “county_number”,**
** “type” : [ “null”, “int” ],**
** “default” : null,**
** “columnName” : “county_number”,**
** “sqlType” : “4”**
** },**
{
“name” : “county_name”,
“type” : [ “null”, “string” ],
“default” : null,
“columnName” : “county_name”,
“sqlType” : “12”
} ],
“tableName” : “county”
}
The one below fails:
{
“type” : “record”,
“name” : “county”,
“doc” : “Sqoop import of county”,
“fields” : [ {
“name” : “county_id”,
“type” : [ “null”, “int” ],
“default” : null,
“columnName” : “county_id”,
“sqlType” : “4”
},
{
“name” : “county_number”,
“type” : [ “null”, “BIGINT” ],
“default” : null,
“columnName” : “county_number”,
“sqlType” : “4”
},
{
“name” : “county_name”,
“type” : [ “null”, “string” ],
“default” : null,
“columnName” : “county_name”,
“sqlType” : “12”
} ],
“tableName” : “county”
}

BigInt data type I think avro does not support. See below link which shows avro supported data type.

https://docs.oracle.com/cd/E57769_01/html/GettingStartedGuide/avroschemas.html#avro-primitivedatatypes

Yes @N_Chakote is right, BIGINT is not supported in Avro. Please try ‘long’ datatype.