[ARROW-11788] [Java] Appending Empty List Vector yields NPE

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 4.0.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27639
• Assignee: Unassigned
• Reporter: Nick Bruno
• Created: 25/Feb/21 20:10
• Updated: 11/Jan/23 08:22
• Resolved: 01/Mar/21 04:33

Description

Attempting to append a list vector that is empty to another vector that is also empty using VectorAppender raises an NPE. Instead, it should just skip processing and do nothing. 

java.lang.IndexOutOfBoundsException: index: 0, length: 4 (expected: range(0, 0))
 at org.apache.arrow.memory.ArrowBuf.checkIndexD(ArrowBuf.java:318)
 at org.apache.arrow.memory.ArrowBuf.chk(ArrowBuf.java:305)
 at org.apache.arrow.memory.ArrowBuf.getInt(ArrowBuf.java:424)
 at org.apache.arrow.vector.util.VectorAppender.visit(VectorAppender.java:195)
 at org.apache.arrow.vector.util.VectorAppender.visit(VectorAppender.java:45)
 at org.apache.arrow.vector.complex.ListVector.accept(ListVector.java:449)

Issue Links

• links to: GitHub Pull Request #9581