[jira] [Created] (AVRO-1927) If a default value is set, Avro allows null values in non-nullable fields.

["Andreas Maier (JIRA)" <ji...@apache.org>]

Andreas Maier created AVRO-1927:
-----------------------------------

             Summary: If a default value is set, Avro allows null values in non-nullable fields.
                 Key: AVRO-1927
                 URL: https://issues.apache.org/jira/browse/AVRO-1927
             Project: Avro
          Issue Type: Bug
          Components: java
    Affects Versions: 1.8.1
            Reporter: Andreas Maier


With an avro schema like
{code}
{
  "name": "myfield",
  "type": "string",
  "default": ""
}
{code}
the following code should throw an exception
{code}
MyObject myObject = MyObject.newBuilder().setMyfield(null).build();
{code}
But instead the value of myfield is set to null, which causes an exception later when serializing myObject, because null is not a valid value for myfield. 

I believe in this case setMyfield(null) should throw an exception, independent of the value of default. 
See also
https://stackoverflow.com/questions/38509279/generated-avro-builder-set-null-doesnt-overwrite-with-default



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