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https://issues.apache.org/jira/browse/HIVE-28007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17811751#comment-17811751
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Kokila N commented on HIVE-28007:
---------------------------------
Two DATETIME format changes in JDK11:{*}D{*} represents DAY_OF_YEAR as in it
counts days from 1-366 which requires DDD in format (dd represents DAY_OF_MONTH
-> counts 1-31).
*JDK8:* If given format is DD(width=2) but the day is actually with 3
width(above 100) in the input value then this will trigger error that width
exceeds 2 and returns null.
*JDK11:* If given format is DD or DDD then max width is set to 3(hardcoded) so
it considers days with 2 and 3 digits as valid and returns the value which
corresponds to the day in the year.
*Commit:*
[https://github.com/openjdk/jdk11u-dev/commit/4900a8320308f0b55344644a599c4d86afec72d2]{*}A{*}
represents MILLI_OF_DAY.
*JDK8:* Depending on the number of A's given in format, max width is set and
only those number of digits are considered and if the converted value exceeds
max width , it will throw error and return null.
*JDK11:* A's max width is hardcoded to 19, so an error is thrown only if it
exceeds 19 digits.
*Commit:*
[https://github.com/openjdk/jdk11u-dev/commit/386a77fd91612badbb14edc05fe4142415192b46]Changing
the value in test cases should be fine for these tests in
*TestGenericUDFDateFormatEvaluate.java and
TestGenericUDFFromUnixTimeEvaluate.java* as the JDK behaviour has changed.
> Java 11: Failure of TimeStamp tests
> ------------------------------------
>
> Key: HIVE-28007
> URL: https://issues.apache.org/jira/browse/HIVE-28007
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Affects Versions: 4.1.0
> Reporter: Kokila N
> Assignee: Kokila N
> Priority: Major
>
> Test cases are failing with value changes in timestamp. Check if its jdk
> behavioural change and solve.
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