[jira] [Commented] (IGNITE-8343) InetSocketAddress.getAddress() returns null, should check it in TcpCommunicationSpi

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

    [ https://issues.apache.org/jira/browse/IGNITE-8343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479078#comment-16479078 ] 

Ilya Kasnacheev commented on IGNITE-8343:
-----------------------------------------

It turns out there's some checks which prevents this issue to be much more visible, in TcpDiscoverySpi.

Still, it's possible to get IPv6 addresses for Communication from other nodes even if they Discovery by IPv4.

> InetSocketAddress.getAddress() returns null, should check it in TcpCommunicationSpi
> -----------------------------------------------------------------------------------
>
>                 Key: IGNITE-8343
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8343
>             Project: Ignite
>          Issue Type: Bug
>          Components: general
>            Reporter: Ilya Kasnacheev
>            Assignee: Ilya Kasnacheev
>            Priority: Major
>
> This is especially notorious in the following scenario:
> {code}
> // -Djava.net.preferIPv4Stack=true
>         System.err.println(new InetSocketAddress("0:0:0:0:0:0:0:1%lo", 12345).getAddress()); // null
> {code}
> Yes we already warn if different nodes have differing preferIPv4Stack, still this is warning not a error, and there may be other cases where getAddress() returns null. Should make a check.



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