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From "Ferdinand Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11579) Invoke the set command will close standard error output[beeline-cli]
Date Wed, 19 Aug 2015 14:32:45 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14703099#comment-14703099
] 

Ferdinand Xu commented on HIVE-11579:
-------------------------------------

When initializing the session error output stream(server side) and beeline error output stream(client
side), they are both redirected to the standard error output. When invoking beeline.error,
it will output some msg to the beeline error output stream. At the meantime, the server side
will log this error as well. It's a little bit confusing since they actually output the error
msg twice. Given an example, you trying to use `lss` which is invalid command, the server
side will throw an exception which is output to the session's error output stream. When the
client gets the exception, we will use the method beeline.error to output this error again.

> Invoke the set command will close standard error output[beeline-cli]
> --------------------------------------------------------------------
>
>                 Key: HIVE-11579
>                 URL: https://issues.apache.org/jira/browse/HIVE-11579
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CLI
>            Reporter: Ferdinand Xu
>            Assignee: Ferdinand Xu
>         Attachments: HIVE-11579-beeline-cli.patch, HIVE-11579.2-beeline-cli.patch
>
>
> We can easily reproduce the debug by the following steps:
> {code}
> hive> set system:xx=yy;
> hive> lss;
> hive> 
> {code}
> The error output disappeared since the err outputstream is closed when closing the Hive
statement.
> This bug occurred also in the upstream when using the embeded mode as the new CLI uses.



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