[jira] [Commented] (ARROW-11788) [Java] Appending Empty List Vector yields NPE

["Nick Bruno (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-11788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17291210#comment-17291210 ] 

Nick Bruno commented on ARROW-11788:
------------------------------------

I can also look at this one and submit a PR for it.

> [Java] Appending Empty List Vector yields NPE
> ---------------------------------------------
>
>                 Key: ARROW-11788
>                 URL: https://issues.apache.org/jira/browse/ARROW-11788
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Java
>    Affects Versions: 3.0.0
>            Reporter: Nick Bruno
>            Priority: Major
>
> 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. 
> {noformat}
> 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){noformat}



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