[ARROW-6040] [Java] Dictionary entries are required in IPC streams even when empty

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/22443
• Assignee: Ji Liu
• Reporter: Steven Fackler
• Created: 25/Jul/19 18:02
• Updated: 11/Jan/23 07:44
• Resolved: 21/Aug/19 05:37

Description

Java's ArrowReader requires that dictionaries are sent in an IPC stream: https://github.com/apache/arrow/blob/master/java/vector/src/main/java/org/apache/arrow/vector/ipc/ArrowReader.java#L196-L200.

However, as noted in ARROW-6006, that is not required if the stream contains no values.

Issue Links

• links to: GitHub Pull Request #4960