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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-19726) ORC date PPD is broken
Date Tue, 29 May 2018 06:25:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-19726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran reassigned HIVE-19726:
--------------------------------------------


> ORC date PPD is broken
> ----------------------
>
>                 Key: HIVE-19726
>                 URL: https://issues.apache.org/jira/browse/HIVE-19726
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.4.0, 3.1.0, 3.0.1, 4.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>
> When kryo was in version 2.22 we added a fix in HIVE-7222 and later in HIVE-10819. Now
that we have updated kryo to 3.0.3 that old workaround fix was never removed. The issue was
that kryo serialized Timestamp to Date type. So to recover the timestamp, during deserialization
we deserialized *any* date instance to Timestamp object which is wrong (we don't know if date
was serialized as date or timestamp serialized as date in first place). This breaks PPD on
date time as kryo deserialization always converts Date to Timestamp breaking PPD because of
type mismatch.
> Now that we have newer kryo version we can remove the code added in HIVE-10819.   



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