[ARROW-400] [Java] ArrowWriter writes length 0 for Struct types

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.2.0
• Component/s: Java
• External issue URL: https://github.com/apache/arrow/issues/16028
• Assignee: Julien Le Dem
• Reporter: Wes McKinney
• Created: 01/Dec/16 20:02
• Updated: 11/Jan/23 07:08
• Resolved: 09/Dec/16 17:04

Description

Observed in integration testing. In a length-7 struct, the field metadata for the struct node has length 0 in the flatbuffer. From C++ gdb:

(gdb) p field_meta
$1 = {length = 0, null_count = 0}

See attached example json file