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https://issues.apache.org/jira/browse/TINKERPOP-2763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen Mallette closed TINKERPOP-2763.
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Fix Version/s: 3.5.4
Assignee: Stephen Mallette
Resolution: Fixed
Fixed with
https://github.com/apache/tinkerpop/commit/29346f53b8955326964c54b5ffed04698a16c797
> client.submitAsync returns None value
> -------------------------------------
>
> Key: TINKERPOP-2763
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2763
> Project: TinkerPop
> Issue Type: Bug
> Components: driver, python
> Affects Versions: 3.5.2, 3.5.3
> Reporter: John Pao
> Assignee: Stephen Mallette
> Priority: Minor
> Fix For: 3.5.4
>
>
> In gremlin-python driver versions 3.5.2 and 3.5.3, the client.submit_async()
> function was added and the client.submitAsync() function was changed to call
> into it and warn about future deprecation.
>
> The line in submitAsync which invokes the new function submit_async does not
> return the future back to the caller, resulting in the caller receiving a
> None object.
> [https://github.com/apache/tinkerpop/blob/8b30b63d00630d3b6c6bd170e8168aed7c69abff/gremlin-python/src/main/python/gremlin_python/driver/client.py#L152]
>
> This in turn means that an application which upgrades from 3.4.x to latest
> 3.5.x will break when trying to read result from the response future.
>
> > AttributeError: 'NoneType' object has no attribute 'result'
>
> This issue is fixed in 3.6.x with the addition of an explicit return
> statement, but has persisted from driver version 3.5.2 to 3.5.3.
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