[jira] [Created] (IGNITE-12415) .NET: Thin client does not connect to old server nodes

[Anton Vinogradov (Jira)]

Pavel Tupitsyn created IGNITE-12415:
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             Summary: .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
             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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