[AVRO-1654] SpecificDatumReader fails to construct when using a multidimensional array of a custom type

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 1.7.7
• Component/s: csharp
• Assignee: Unassigned
• Reporter: Patrick Drury
• Created: 30/Mar/15 15:35
• Updated: 30/Mar/15 17:44

Description

Using generated C# code from a schema like the example below I get an AvroException in ObjectCreator.FindType when attempting to construct a SpecificDatumReader. The exception text for the example below will mention not being able to find the type "System.Collections.Generic.IList`1[mynamespace.Item]" in all loaded assemblies. I've seen that a similar issue AVRO-1109 has been raised and resolved before, and multidimensional arrays of simple types seem to be ok but complex types seem to still be a problem. The same applies to maps of arrays. I assume that maps of maps also have the same issue but I haven't tested this.

{
  "type": "record",
  "name": "Test",
  "namespace": "mynamespace",
  "fields": [
    "name" : "multidimensional",
    "type" : {
      "type" : "array",
      "items": {
        "type": "array",
        "items" : {
          "type" : "record",
          "name" : "Item",
          "fields" : [
            {
              "name": "some_field",
              "type": "string"
            },
            {
              "name": "another_field",
              "type": "string"
            }
          ]
        }
      }
    }
  ]
}