[jira] [Assigned] (HIVE-21425) Use DirectExecutorService for getInputSummary

["David Mollitor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-21425?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Mollitor reassigned HIVE-21425:
-------------------------------------

    Assignee: David Mollitor

> Use DirectExecutorService for getInputSummary
> ---------------------------------------------
>
>                 Key: HIVE-21425
>                 URL: https://issues.apache.org/jira/browse/HIVE-21425
>             Project: Hive
>          Issue Type: Improvement
>          Components: HiveServer2
>    Affects Versions: 4.0.0, 3.2.0
>            Reporter: David Mollitor
>            Assignee: David Mollitor
>            Priority: Minor
>
> {code:java|title=Utilities.java}
>       int numExecutors = getMaxExecutorsForInputListing(ctx.getConf(), pathNeedProcess.size());
>       if (numExecutors > 1) {
>         LOG.info("Using {} threads for getContentSummary", numExecutors);
>         executor = Executors.newFixedThreadPool(numExecutors,
>                 new ThreadFactoryBuilder().setDaemon(true)
>                         .setNameFormat("Get-Input-Summary-%d").build());
>       } else {
>         executor = null;
>       }
> {code}
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java#L2482-L2490
> Instead of using a 'null' {{ExecutorService}}, use Guava's {{DirectExecutorService}} and remove special casing for a 'null' value.



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