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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5547) Drill config options and session options do not work as intended
Date Wed, 12 Jul 2017 17:57:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16084402#comment-16084402
] 

Jinfeng Ni commented on DRILL-5547:
-----------------------------------

I have not looked into the detail. I have a general question.  Since this patch will load
options from Drill config into system option table,  does it require every drillbit have the
same, identical Drill config files? What will happen if Drillbits have different Drill config
files? 







> Drill config options and session options do not work as intended
> ----------------------------------------------------------------
>
>                 Key: DRILL-5547
>                 URL: https://issues.apache.org/jira/browse/DRILL-5547
>             Project: Apache Drill
>          Issue Type: Bug
>          Components:  Server
>    Affects Versions: 1.10.0
>            Reporter: Karthikeyan Manivannan
>            Assignee: Venkata Jyothsna Donapati
>             Fix For: Future
>
>
> In Drill, session options should take precedence over config options. But several of
these session options are assigned hard-coded default values when the option validators are
initialized. Because of this config options will never be read and honored even if the user
did not specify the session option. 
> ClassCompilerSelector.JAVA_COMPILER_VALIDATOR uses CompilerPolicy.DEFAULT as the default
value. This default value gets into the session options map via the initialization of validators
in SystemOptionManager. 
> Now any piece of code that tries to check if a session option is set will never see a
null, so it will always use that value and never try to look into the config options. For
example, in the following piece of code from ClassCompilerSelector (), the policy will never
be read from the config file.
> policy = CompilerPolicy.valueOf((value != null) ? value.string_val.toUpperCase() : config.getString(JAVA_COMPILER_CONFIG).toUpperCase());



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