[TINKERPOP-2210] Support cancellation of remote traversals

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.4.1
• Component/s: server
• Assignee: Unassigned
• Reporter: Florian Hockmann
• Created: 07/May/19 07:32
• Updated: 13/Sep/22 16:58

Description

It should be possible to cancel a remote traversals in Gremlin, for example when an application shuts down. This involves the following steps:

• Cancel the send operation.
• Cancel the task the user is awaiting on by cancelling the underlying TaskCompletionSource. This means that any received data for this traversal needs to be ignored afterwards.
• Cancel the operation on the server if possible.

I'm not sure if / how we can cancel the operation on the server. If it's not easy to do that right now, then we should just start by cancelling everything only client-side.