[jira] [Commented] (ARROW-7746) [Java] Support large buffer for Flight

["Liya Fan (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-7746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17046431#comment-17046431 ] 

Liya Fan commented on ARROW-7746:
---------------------------------

It seems the PR for ARROW-7610 is already big enough. To make code reviewing easier, I have opened ARROW-7955 to track the support for file/stream IPC. 

> [Java] Support large buffer for Flight
> --------------------------------------
>
>                 Key: ARROW-7746
>                 URL: https://issues.apache.org/jira/browse/ARROW-7746
>             Project: Apache Arrow
>          Issue Type: Task
>          Components: Java
>            Reporter: Liya Fan
>            Priority: Major
>
> The motivation is described in https://github.com/apache/arrow/pull/6323#issuecomment-580137629.
> When the size of the ArrowBuf exceeds 2GB, our flighing library does not work due to integer overflow. 
> This is because internally, we have used some data structures which are based on 32-bit integers. To resolve the problem, we must revise/replace the data structures to make them support 64-bit integers. 
> As a concrete example, we can see that when the server sends data through IPC, an org.apache.arrow.flight.ArrowMessage object is created, and is wrapped as an InputStream through the `asInputStream` method. In this method, we use data stuctures like java.io.ByteArrayOutputStream and io.netty.buffer.ByteBuf, which are based on 32-bit integers (we can observe that NettyArrowBuf#length and ByteArrayOutputStream#count are both 32-bit integers). 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)