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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4078) Remove the serialize-deserialize pair in CommonJoinResolver
Date Wed, 27 Feb 2013 21:01:13 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gopal V updated HIVE-4078:
--------------------------

    Attachment: HIVE-4078-20130227.patch

Updated to throw an exception if the cloner throws a SemanticException wrapped around the
IllegalAccess or Invocation exception that are possible (but unlikely).
                
> Remove the serialize-deserialize pair in CommonJoinResolver
> -----------------------------------------------------------
>
>                 Key: HIVE-4078
>                 URL: https://issues.apache.org/jira/browse/HIVE-4078
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Gopal V
>            Assignee: Gopal V
>         Attachments: HIVE-4078-20130227.patch, HIVE-4078.patch
>
>
> CommonJoinProcessor tries to clone a MapredWork while attempting a conversion to a map-join
> {code}
>   // deep copy a new mapred work from xml
>   InputStream in = new ByteArrayInputStream(xml.getBytes("UTF-8"));
>   MapredWork newWork = Utilities.deserializeMapRedWork(in, physicalContext.getConf());
> {code}
> which is a very heavy operation memory wise & cpu-wise.
> Instead of cloning via XMLEncoder, it is faster to use BeanUtils.cloneBean() which is
following same data paths (get/set bean methods) instead.

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