[jira] [Commented] (IMPALA-10962) Toolchain Python loses readline functionality on Ubuntu 20.04

["Laszlo Gaal (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-10962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17427189#comment-17427189 ] 

Laszlo Gaal commented on IMPALA-10962:
--------------------------------------

This problem raises the priority of IMPALA-10199: the toolchain should provide binaries built on Ubuntu 20.04 to be run on the Ubuntu 20.04 instead of relying on (now questionable) compatibility

> Toolchain Python loses readline functionality on Ubuntu 20.04
> -------------------------------------------------------------
>
>                 Key: IMPALA-10962
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10962
>             Project: IMPALA
>          Issue Type: Bug
>    Affects Versions: Impala 4.0.0
>            Reporter: Laszlo Gaal
>            Priority: Critical
>
> Toolchain Python lacks {{readline}} functionality when running on Ubuntu 20.04.
> The most visible corollary is that {{impala-shell}} loses command-line editing capabilities as well.
> This happens because the Impala project currently uses UBuntu 18 binaries when it detects a Ubuntu 20 platform (see IMPALA-10199). Toolchain Python built on Ubuntu 18 binds to {{libreadline.so.7}}, which doesn't exist on Ubuntu 20. only the {{libreadline.so.8}} is provided.
> The workaround is relatively easy; execute as {{root}}:
> {code:java}
> # cd /lib/x86_64-linux-gnu
> # ln -s libreadline.so.8 libreadline.so.7{code}
> but this is not obvious, and Impala contributors should not be forced to execute this.



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