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https://issues.apache.org/jira/browse/HIVE-1117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833118#action_12833118
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Zheng Shao commented on HIVE-1117:
----------------------------------

Hi Jeff, Hive was using the XMLEncoder for the plan from the beginning. I don't 
see a strong reason that we need to switch now. Maybe we can revisit it at some 
time later when there is a need.

Also, I have a question for Avro: does it support circular dependency in the 
object graph? For example, a plan object that contains a field which is an 
operator object, and the operator object contains a field which stores the plan 
object.


> Make QueryPlan serializable
> ---------------------------
>
>                 Key: HIVE-1117
>                 URL: https://issues.apache.org/jira/browse/HIVE-1117
>             Project: Hadoop Hive
>          Issue Type: Improvement
>            Reporter: Zheng Shao
>            Assignee: Zheng Shao
>             Fix For: 0.6.0
>
>
> We need to make QueryPlan serializable so that we can resume the query some 
> time later.

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