[ARROW-1779] [Java] Integration test breaks without zeroing out validity vectors

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.8.0
• Component/s: Integration
• External issue URL: https://github.com/apache/arrow/issues/15621
• Assignee: Unassigned
• Reporter: Li Jin
• Created: 08/Nov/17 00:01
• Updated: 11/Jan/23 07:16
• Resolved: 16/Nov/17 00:04

Description

This is discovered in https://github.com/apache/arrow/pull/1290

I found one the integration test (nested) failed without zeroing out validity vectors before loading the array from json.

I have created three files to reproduce this:
(1) nested.json
(2) nested.good (zeroing out validity vector before reading)
(3) nested.bad (not zeroing out validity vector before reading)

(1) / (2) and (1) / (3) both pass Java integration test, however (1) / (3) fails C++ test - one of the validity vector in (3) doesn't seem to be read correctly.

I am not sure what the issue is because I cannot reproduce an error in Java. I am hoping maybe some one more familiar with C++ could take a look and give some insights what's the wrong with (3).