[jira] [Updated] (HIVE-16806) Utilities isEmptyPath Loads All Files

["BELUGA BEHR (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-16806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

BELUGA BEHR updated HIVE-16806:
-------------------------------
    Attachment: HIVE-16806.1.patch

> Utilities isEmptyPath Loads All Files
> -------------------------------------
>
>                 Key: HIVE-16806
>                 URL: https://issues.apache.org/jira/browse/HIVE-16806
>             Project: Hive
>          Issue Type: Improvement
>    Affects Versions: 2.1.1, 3.0.0
>            Reporter: BELUGA BEHR
>            Priority: Minor
>         Attachments: HIVE-16806.1.patch
>
>
> {code:title=org.apache.hadoop.hive.ql.exec.Utilities.isEmptyPath(Configuration, Path)}
>   public static boolean isEmptyPath(Configuration job, Path dirPath) throws IOException {
>     FileSystem inpFs = dirPath.getFileSystem(job);
>     try {
>       FileStatus[] fStats = inpFs.listStatus(dirPath, FileUtils.HIDDEN_FILES_PATH_FILTER);
>       if (fStats.length > 0) {
>         return false;
>       }
>     } catch(FileNotFoundException fnf) {
>       return true;
>     }
>     return true;
>   }
> {code}
> You can see here that the code is loading every instance of {{FileStatus}} even though all we care about here is if there are any.  I propose adding a new filter which stops collecting files into this array once it has found at least one. 



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