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https://issues.apache.org/jira/browse/TINKERPOP-2336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17052487#comment-17052487
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Stephen Mallette commented on TINKERPOP-2336:
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It's worth noting that in the process of the 3.5.0 changes I manually tested
the prior version of server/driver against 3.5.0 and ensured compatibility and
expected behavior. 3.4.x/3.3.x driver has no problem dealing with the
modification to the 3.5.0 protocol around the now removed session "close"
message and 3.5.0 driver which no longer sends the "close" message works nicely
with the 3.3.x/3.4.x servers that still process that message.
> Allow close of channel without having to wait for server
> --------------------------------------------------------
>
> Key: TINKERPOP-2336
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2336
> Project: TinkerPop
> Issue Type: Improvement
> Components: driver
> Affects Versions: 3.3.10
> Reporter: Stephen Mallette
> Assignee: Stephen Mallette
> Priority: Major
> Labels: deprecation
> Fix For: 3.5.0, 3.3.11, 3.4.7
>
>
> The java driver hangs about waiting for results to return after a
> {{Client.close()}} is called. That creates problems if there is a desire to
> kill the client but there is a long run query on the server and that query is
> configured to an especially long timeout. I think there just needs to be a
> configuration for the amount of time the client will wait for results before
> just giving up and shutting down. A byproduct of this change is that by
> allowing the {{Client}} to close the channel while a query is executing
> creates a cancellation sort of functionality which should issue an interrupt
> to the traversal executing on the server.
> With this change in place it sort of creates a feature somewhat at odds with
> the session "close" message which tries to release a specific session. The
> problem with that message is that it really is only useful if there is not
> already a message ahead of it getting processed and stuck otherwise it is
> queued and won't be processed until the message ahead of it is handled.
> Obviously, if the goal is to kill the session because of a long run process
> then this feature becomes a bit unhelpful. If the close of the channel
> accomplishes the same thing as the close message then I think we would want
> to deprecate the close message and remove it for 3.5.0.
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