[AVRO-1588] ReflectData.AllowNull incorrectly handles primitive types.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.7.7
• Component/s: java
• Assignee: Unassigned
• Reporter: Joey Echeverria
• Created: 17/Sep/14 21:58
• Updated: 22/Sep/14 22:30
• Resolved: 22/Sep/14 22:30

Description

When doing the following:

private static class PoJo {
  private long id;
  private String name;
}

ReflectData.AllowNull.get().getSchema(PoJo.class);

I'd expect a schema like this:

{
  "type" : "record",
  "name" : "PoJo",
  "namespace" : "MyObject$",
  "fields" : [ {
    "name" : "id",
    "type" : "long",
  }, {
    "name" : "name",
    "type" : [ "null", "string" ],
    "default" : null
  } ]
}

But instead I get:

{
  "type" : "record",
  "name" : "PoJo",
  "namespace" : "MyObject$",
  "fields" : [ {
    "name" : "id",
    "type" : [ "null", "long" ],
    "default" : null
  }, {
    "name" : "name",
    "type" : [ "null", "string" ],
    "default" : null
  } ]
}

This will later result in an NullPointerException when you try to deserialize bytes where id was null when it tries to convert the Long to a long.

Issue Links

• duplicates: AVRO-1589 [Java] ReflectData.AllowNulls will create incompatible Schemas for primitive types