[jira] [Resolved] (IMPALA-8659) Allow self-RPCs for KRPC to go via loopback

["Tim Armstrong (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-8659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-8659.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: Impala 3.3.0

> Allow self-RPCs for KRPC to go via loopback
> -------------------------------------------
>
>                 Key: IMPALA-8659
>                 URL: https://issues.apache.org/jira/browse/IMPALA-8659
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Distributed Exec
>            Reporter: Tim Armstrong
>            Assignee: Tim Armstrong
>            Priority: Major
>             Fix For: Impala 3.3.0
>
>
> Our KRPC implementation currently sends all RPCs, even those to the current host, through a single external IP. There are some cases why we might not want to do this. The immediately motivating issue for me is bugs in some tooling that cause self-RPCs on external IPs to fail. See https://github.com/istio/istio/issues/12551.
> There are really two parts to this:
> * Listening on the 127.0.0.1 interface
> * Intercepting RPCs to the external IP and sending them to 127.0.0.1 instead.
> An alternative solution would be to completely bypass the RPC stack, but that would be far more invasive.



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