[jira] [Commented] (TINKERPOP-1453) Allow Gremlin-Python to handle asynchronous failure

["Carlos Cheung (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15504382#comment-15504382 ] 

Carlos Cheung commented on TINKERPOP-1453:
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How much of an issue would it be to remove most of the Tornado specifics and implement a threaded solution? 
I can't seem to see a way to implement this utilizing Tornado's future as it's built in the way that it's assumed 1 result = 1 response. However, in this case Gremlin Server could very well produce 2 responses for every result in the case of an error. 

> Allow Gremlin-Python to handle asynchronous failure
> ---------------------------------------------------
>
>                 Key: TINKERPOP-1453
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1453
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: driver, language-variant
>    Affects Versions: 3.2.2
>         Environment: Titan 1.1
> Gremlin 3.2.2
>            Reporter: Carlos Cheung
>
> Titan occasionally returns transaction errors for a transaction that was sent a few requests back. Since Gremlin-Python assumes a request sent will get only its own answer back, this can cause the request-answer to no longer be in sync and there is no mechanism to recover. 
> It would be nice to have a way for the receiver to check the request-id to see if it corresponds to the original request. Additionally there should be a rolling transaction log in the case of a server error, so a recovery/try might be possible. 
> By implementing this, it would be possible to send Gremlin queries asynchronously as well. 



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