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https://issues.apache.org/jira/browse/HIVE-3454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14340221#comment-14340221
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Aihua Xu commented on HIVE-3454:
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I see your points that multiple threads run in single mapper or reducer access
that class and that may cause concurrency issue. I will try to call the
initialize() from Mapper and Reducer's initialization function to make sure it
initializes once. And also Driver.compile() (I will check what would be the
good place for the local mode).
> 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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