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https://issues.apache.org/jira/browse/HIVE-3454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14346318#comment-14346318
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Jason Dere commented on HIVE-3454:
----------------------------------

I'm willing to defer that work to a different Jira. +1

But I'm surprised this would not be an issue with HOS as well .. can HOS have 
multiple threads doing work for more than one query at the same time? If so 
then HOS would get hit by this too since this setting is relying on a static 
variable.

> Problem with CAST(BIGINT as TIMESTAMP)
> --------------------------------------
>
>                 Key: HIVE-3454
>                 URL: https://issues.apache.org/jira/browse/HIVE-3454
>             Project: Hive
>          Issue Type: Bug
>          Components: Types, UDF
>    Affects Versions: 0.8.0, 0.8.1, 0.9.0, 0.10.0, 0.11.0, 0.12.0, 0.13.0, 
> 0.13.1
>            Reporter: Ryan Harris
>            Assignee: Aihua Xu
>              Labels: newbie, newdev, patch
>         Attachments: HIVE-3454.1.patch.txt, HIVE-3454.2.patch, 
> HIVE-3454.3.patch, HIVE-3454.4.patch, HIVE-3454.patch
>
>
> Ran into an issue while working with timestamp conversion.
> CAST(unix_timestamp() as TIMESTAMP) should create a timestamp for the current 
> time from the BIGINT returned by unix_timestamp()
> Instead, however, a 1970-01-16 timestamp is returned.



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