[jira] [Commented] (DRILL-5533) Fix flag assignment in FunctionInitializer.checkInit() method

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-5533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035802#comment-16035802 ] 

ASF GitHub Bot commented on DRILL-5533:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/drill/pull/843


> Fix flag assignment in FunctionInitializer.checkInit() method
> -------------------------------------------------------------
>
>                 Key: DRILL-5533
>                 URL: https://issues.apache.org/jira/browse/DRILL-5533
>             Project: Apache Drill
>          Issue Type: Bug
>    Affects Versions: 1.10.0
>            Reporter: Arina Ielchiieva
>            Assignee: Arina Ielchiieva
>            Priority: Minor
>              Labels: ready-to-commit
>
> FunctionInitializer.checkInit() method uses DCL to ensure that function body is loaded only once. But flag parameter is never updated and all threads are entering synchronized block.
> Also FunctionInitializer.getImports() always returns empty list.
> https://github.com/apache/drill/blob/3e8b01d5b0d3013e3811913f0fd6028b22c1ac3f/exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/FunctionInitializer.java
> Changes:
> 1. Fix DCL in FunctionInitializer.checkInit() method (update flag parameter  when function body is loaded).
> 2. Fix ImportGrabber.getImports() method to return list with imports.
> 3. Add unit tests for FunctionInitializer.
> 4. Minor refactoring (rename methods, add javadoc).



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