title: Avro schema update with two schema in one avro file
body: <p>I have one avro file with first schema then I updated the schema that appends to the same file. So now I have two schemas in one file. How does avro handle this scenario. Will I have any new fields add in the file or will I loose any data while reading this data. This is a real time streaming application where I am writing the data to hdfs. My upstream system might update the schema but the hdfs writer might be on old schema. So the hdfs avro file will have two schemas until I update the writer to handle the newer schema. </p>
  
  <p>Note - I don't have schema registry and I am creating one avro file per day. So if a schema is updated in the middle of the day, I will have one avro file with two schemas.</p>