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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5547) Drill config options and session options do not work as intended
Date Tue, 11 Jul 2017 23:55:01 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16083192#comment-16083192
] 

ASF GitHub Bot commented on DRILL-5547:
---------------------------------------

Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/868#discussion_r126828326
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/server/options/SystemOptionManager.java
---
    @@ -48,11 +50,46 @@
      * Only one instance of this class exists per drillbit. Options set at the system level
affect the entire system and
      * persist between restarts.
      */
    +
    +/**
    + *  Drill has two different config systems each with its own namespace.First being the
HOCON based boot time config
    + *  system.This is a hierarchical system where the top layers override the bottom ones
in the following order
    + *
    + *  Java System Options
    + *  distrib.conf
    + *  drill-override.conf
    + *  drill-module.conf
    --- End diff --
    
    As it turns out, Javadoc is just fancy HTML. So, a list should be:
    
    ```
    <ul>
    <li>Java System Options</li>
    <li>...</li>
    </ul>
    ```
    
    In Eclipse, you can over the cursor over a symbol to see the formatted Javadoc. Does IntelliJ
have something similar so you can see the formatted version?


> 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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