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https://issues.apache.org/jira/browse/ARROW-3328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16628326#comment-16628326
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Wes McKinney commented on ARROW-3328:
-------------------------------------

Good point. I guess if you need a "leg" identifier this could be serialized in 
the ticket

> [Flight] Allow for optional unique flight identifier to be sent with 
> FlightGetInfo
> ----------------------------------------------------------------------------------
>
>                 Key: ARROW-3328
>                 URL: https://issues.apache.org/jira/browse/ARROW-3328
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: FlightRPC
>            Reporter: Wes McKinney
>            Priority: Major
>             Fix For: 0.12.0
>
>
> There could either be
> * A global identifier for the entire flight
> * Endpoint-specific identifiers
> A client could use these unique identifier to perform other kinds of actions. 
> An example would be retrieving logs or statistics about a get -- you could 
> see time spent writing the dataset to gRPC or time spent constructing the 
> dataset before handing off to the gRPC write layer



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