Radu Iviniciu created TINKERPOP-2531:
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Summary: Gremlin .NET driver ConnectionPool can remain without
connections if server is down for 1-2 minutes
Key: TINKERPOP-2531
URL: https://issues.apache.org/jira/browse/TINKERPOP-2531
Project: TinkerPop
Issue Type: Bug
Affects Versions: 3.4.10
Reporter: Radu Iviniciu
We are using Gremlin .NET client to connect to AWS Neptune.
If the server is down for even just 1 - 2 minutes (E,.g. Instance reboot) the
connection pool can remain without any healthy connections permanently even
after the server comes back up again.
Tracked this down to here:
https://github.com/apache/tinkerpop/blob/60bfc90ce43567d609b1165989c1c74ce825109b/gremlin-dotnet/src/Gremlin.Net/Driver/ConnectionPool.cs#L154
If the server was not ready yet and the connections were not restored as part
of the previous TryGetAvailableConnection then the connection pool will remain
empty indefinitely and all connections are dead even after the server is back
up.
Is this longer-ish downtime a use case the client should handle ? Or is it
expected behavior and we should let the caller handle the
ServerUnavailableException, potentially recreate the GremClient altogether ?
What do you guys think ? If this is something the client should handle I can
take a stab at it and put up a PR.
Thank you.
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