[AVRO-1544] Union of enum and null can result in NPE on validate if null is not first

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7.6
• Fix Version/s: 1.8.0, 1.9.0
• Component/s: java
• Assignee: Matthew Hayes
• Reporter: Matthew Hayes
• Created: 12/Jul/14 15:47
• Updated: 24/Oct/19 08:25
• Resolved: 04/Aug/14 20:09

Description

The ENUM case in validate is missing a null check for datum:

    case ENUM:
      return schema.getEnumSymbols().contains(datum.toString());

This leads to a surprising error where a NPE is thrown for a union of enum and null when the enum is first in the union. If null is first it works. The fix is a simple. I'm creating a patch that adds the fix and a unit test for this case.