[jira] [Updated] (HIVE-13523) Fix connection leak in ORC RecordReader and refactor for unit testing

["Thomas Poepping (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-13523?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Thomas Poepping updated HIVE-13523:
-----------------------------------
    Attachment: HIVE-13523.patch

> Fix connection leak in ORC RecordReader and refactor for unit testing
> ---------------------------------------------------------------------
>
>                 Key: HIVE-13523
>                 URL: https://issues.apache.org/jira/browse/HIVE-13523
>             Project: Hive
>          Issue Type: Bug
>          Components: ORC
>    Affects Versions: 2.0.0
>            Reporter: Thomas Poepping
>         Attachments: HIVE-13523.patch
>
>
> In RecordReaderImpl, a MetadataReaderImpl object was being created (opening a file), but never closed, causing a leak. This change closes the Metadata object in RecordReaderImpl, and does substantial refactoring to make RecordReaderImpl testable:
>  * Created DataReaderFactory and MetadataReaderFactory (plus default implementations) so that the create() methods can be mocked to verify that the objects are actually closed in RecordReaderImpl.close()
>  * Created MetadataReaderProperties and DataReaderProperties to clean up argument lists, making code more readable
>  * Created a builder() for RecordReaderImpl to make the code more readable
>  * DataReader and MetadataReader now extend closeable (there was no reason for them not to in the first place) so I can use the guava Closer interface: http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/io/Closer.html
>  * Use the Closer interface to guarantee that regardless of if either close() call fails, both will be attempted (preventing further potential leaks)
>  * Create builders for MetadataReaderProperties, DataReaderProperties, and RecordReaderImpl to help with code readability



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