[jira] [Updated] (TINKERPOP-2148) "no connection available!" is being thrown despite lots of free connections

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

     [ https://issues.apache.org/jira/browse/TINKERPOP-2148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zaoshi updated TINKERPOP-2148:
------------------------------
    Component/s:     (was: tinkergraph)

> "no connection available!" is being thrown despite lots of free connections
> ---------------------------------------------------------------------------
>
>                 Key: TINKERPOP-2148
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2148
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: dotnet
>    Affects Versions: 3.4.0
>         Environment: Windows 10, C#, .NET Core, CosmosDB Graph
>            Reporter: Zaoshi
>            Priority: Minor
>
> I am submitting multiple graph queries in parallel but in some cases it starts throwing this exception:
> {{Gremlin.Net.Driver.Exceptions.NoConnectionAvailableException : no connection available!
>    at Gremlin.Net.Driver.ConnectionPool.GetAvailableConnectionAsync()
>    at Gremlin.Net.Driver.GremlinClient.SubmitAsync[T](RequestMessage requestMessage)}}
> When GremlinClient is initialized with {PoolSize = 1, MaxInProcessPerConnection = 8} everything works fine, however, with {PoolSize = 8, MaxInProcessPerConnection = 1} it starts throwing those exceptions even though this connection pool should have same throughput. I have tried to increase pool to {PoolSize = 128, MaxInProcessPerConnection = 1} but GremlinClient started to fail even more.



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