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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19231) Beeline generates garbled output when using UnsupportedTerminal
Date Tue, 01 May 2018 17:28:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459891#comment-16459891
] 

Aihua Xu commented on HIVE-19231:
---------------------------------

Sounds good. +1.

> Beeline generates garbled output when using UnsupportedTerminal
> ---------------------------------------------------------------
>
>                 Key: HIVE-19231
>                 URL: https://issues.apache.org/jira/browse/HIVE-19231
>             Project: Hive
>          Issue Type: Bug
>          Components: Beeline
>    Affects Versions: 2.1.0
>            Reporter: Naveen Gangam
>            Assignee: Naveen Gangam
>            Priority: Major
>         Attachments: HIVE-19231.patch
>
>
> We had a customer that was using some sort of front end that would invoke beeline commands
with some query files on a node that that remote to the HS2 node.
> So beeline runs locally on this edge but connects to a remote HS2. Since the fix made
in HIVE-14342, the beeline started producing garbled line in the output. Something like
> {code:java}
> ^Mnull                                                   ^Mnull^Mnull               
                                   ^Mnull00-0000	All Occupations	135185230	42270
> 11-0000	Management occupations	6152650	100310{code}
>  
> I havent been able to reproduce the issue locally as I do not have their system, but
with some additional instrumentation I have been able to get some info regarding the beeline
process.
> Essentially, such invocation causes beeline process to run with {{-Djline.terminal=jline.UnsupportedTerminal}}
all the time and thus causes the issue. They can run the same beeline command directly in
the shell on the same host and it does not cause this issue.
> PID            S   TTY          TIME COMMAND
> 44107  S    S  ?        00:00:00 bash beeline -u ...
> PID              S     TTY          TIME COMMAND
> 48453  S+   S     pts/4    00:00:00 bash beeline -u ...
> Somehow that process wasnt attached to any local terminals. So the check made for /dev/stdin
wouldnt work.
>  
> Instead an additional check to check the TTY session of the process before using the
UnsupportedTerminal (which really should only be used for backgrounded beeline sessions) seems
to resolve the issue.



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