[jira] [Commented] (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:comment-tabpanel&focusedCommentId=17107941#comment-17107941 ] 

Denis A. Magda commented on IGNITE-12438:
-----------------------------------------

[~ibessonov], could you please start a discussion on the dev list to discuss this new API? I'm not sure that 'VIRTUALIZED' is the best name for the feature. Let's quickly brainstorm with a broader community.


{code:java}
public enum EnvironmentType {
     /** Default value. */
     STANDALONE,

     /** */
     VIRTUALIZED;
 }
{code}

Also, I see that the feature is planned to be released in the experimental mode. What needs to be done to make it available in the GA state?

> 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
>            Reporter: Alexey Goncharuk
>            Assignee: Ivan Bessonov
>            Priority: Major
>             Fix For: 2.9
>
>          Time Spent: 40m
>  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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