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https://issues.apache.org/jira/browse/IGNITE-12415?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Tupitsyn resolved IGNITE-12415.
-------------------------------------
Resolution: Fixed
> .NET: Thin client does not connect to old server nodes
> ------------------------------------------------------
>
> Key: IGNITE-12415
> URL: https://issues.apache.org/jira/browse/IGNITE-12415
> Project: Ignite
> Issue Type: Bug
> Components: platforms
> Affects Versions: 2.8
> Reporter: Pavel Tupitsyn
> Assignee: Pavel Tupitsyn
> Priority: Blocker
> Labels: .NET
> Fix For: 2.8
>
>
> Exception when trying to connect .NET Thin Client from current master
> (https://www.nuget.org/packages/Apache.Ignite/2.8.0-alpha20191203) to the
> 2.7.6 server node:
> {code}
> Unhandled exception. Apache.Ignite.Core.Client.IgniteClientException: Client
> handshake failed: 'Unsupported version.'. Client version: 1.6.0. Server
> version: 1.2.0
> at
> Apache.Ignite.Core.Impl.Client.ClientSocket.Handshake(IgniteClientConfiguration
> clientConfiguration, ClientProtocolVersion version)
> at
> Apache.Ignite.Core.Impl.Client.ClientSocket..ctor(IgniteClientConfiguration
> clientConfiguration, EndPoint endPoint, String host, Nullable`1 version,
> Action`1 topVerCallback)
> at Apache.Ignite.Core.Impl.Client.ClientFailoverSocket.Connect()
> at
> Apache.Ignite.Core.Impl.Client.ClientFailoverSocket..ctor(IgniteClientConfiguration
> config, Marshaller marsh)
> at
> Apache.Ignite.Core.Impl.Client.IgniteClient..ctor(IgniteClientConfiguration
> clientConfiguration)
> at Apache.Ignite.Core.Ignition.StartClient(IgniteClientConfiguration
> clientConfiguration)
> at ConsoleApp2.Program.Main(String[] args) in
> /home/pavel/RiderProjects/ConsoleApp2/ConsoleApp2/Program.cs:line 14
> [StatusCode=Fail]
> {code}
> This is caused by buggy version handling logic in Handshake method. Otherwise
> we support any older protocol version.
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