test/org/apache/pig/builtin/avro/schema/recordsOfArrays.avsc

{
  "name" : "recordsOfArrays",
  "namespace" : "org.apache.pig.test.builtin",
  "type" : "record",
  "fields" : [
    {"name" : "key", "type" : "string"},
    {"name" : "values",
     "type" : {
       "type" : "array",
       "items" : "int"
     }    
    }
  ]
}