[jira] [Resolved] (IGNITE-12438) Extend communication protocol to establish client-server connection

["Denis A. Magda (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-12438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Denis A. Magda resolved IGNITE-12438.
-------------------------------------
    Resolution: Fixed

> Extend communication protocol to establish client-server connection
> -------------------------------------------------------------------
>
>                 Key: IGNITE-12438
>                 URL: https://issues.apache.org/jira/browse/IGNITE-12438
>             Project: Ignite
>          Issue Type: Improvement
>          Components: documentation
>            Reporter: Alexey Goncharuk
>            Assignee: Artem Budnikov
>            Priority: Major
>              Labels: important
>             Fix For: 2.9
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> Recently there was quite a lot of questions related to thick clients connectivity issues when the clients are deployed in a k8s pod [1]. The general issue here is clients reporting network address which are not reachable from server nodes. At the same time, the clients can connect to server nodes.
> An idea of how to fix this is as follows:
>  * Make sure that think clients discovery SPI always maintains a connection to a server node (this should be already implemented)
>  * (Optionally) detect when a client has only one-way connectivity with the server nodes. This part should be investigated. We need this to avoid server nodes attempt to connect to a client and send communication request to the client node faster
>  * When a server attempts to establish a connection with a client, check if client is unreachable or the previous connection attempt failed. If so, send a discovery message to the client to force a client-server connection. In this case, server will be able to send the original message via the newly established connection.
> [1] https://stackoverflow.com/questions/59192075/ignite-communicationspi-questions-in-paas-environment/59232504



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