//Leads to error
register piggybank.jar;
register json-simple-1.1.jar;
DEFINE AvroStorage org.apache.pig.piggybank.storage.avro.AvroStorage();
A = LOAD 'example.csv' USING PigStorage(',') AS (name:chararray, favorite_number:int, favorite_color:chararray);
STORE A INTO 'example_output' USING org.apache.pig.piggybank.storage.avro.AvroStorage('schema_uri','/Users/vikasshanbhogue/Desktop/avro_storage_repro/example.avsc');

// Works
register piggybank.jar;
register json-simple-1.1.jar;
DEFINE AvroStorage org.apache.pig.piggybank.storage.avro.AvroStorage();
A = LOAD 'example.csv' USING PigStorage(',') AS (name:chararray, favorite_number:int, favorite_color:chararray);
B = FOREACH A Generate favorite_number,name,favorite_color;
STORE B INTO 'example_output' USING org.apache.pig.piggybank.storage.avro.AvroStorage('schema_uri','/Users/vikasshanbhogue/Desktop/avro_storage_repro/example.avsc');

Schema:
{"namespace": "example.avro",
 "type": "record",
 "name": "User",
 "fields": [
     {"name": "favorite_number",  "type": ["int", "null"]},
     {"name": "name", "type": "string"},
     {"name": "favorite_color", "type": ["string", "null"]}
 ]
}