Looking at the list of pull requests it looks like this is the ticket:
https://issues.apache.org/jira/browse/SPARK-24867



On Thu, Jul 19, 2018 at 5:25 PM Reynold Xin <r...@databricks.com> wrote:

> I don't think my ticket should block this release. It's a big general
> refactoring.
>
> Xiao do you have a ticket for the bug you found?
>
>
> On Thu, Jul 19, 2018 at 5:24 PM Saisai Shao <sai.sai.s...@gmail.com>
> wrote:
>
>> Hi Xiao,
>>
>> Are you referring to this JIRA (
>> https://issues.apache.org/jira/browse/SPARK-24865)?
>>
>> Xiao Li <gatorsm...@gmail.com> 于2018年7月20日周五 上午2:41写道:
>>
>>> dfWithUDF.cache()
>>> dfWithUDF.write.saveAsTable("t")
>>> dfWithUDF.write.saveAsTable("t1")
>>>
>>>
>>> Cached data is not being used. It causes a big performance regression.
>>>
>>>
>>>
>>>
>>> 2018-07-19 11:32 GMT-07:00 Sean Owen <sro...@gmail.com>:
>>>
>>>> What regression are you referring to here? A -1 vote really needs a
>>>> rationale.
>>>>
>>>> On Thu, Jul 19, 2018 at 1:27 PM Xiao Li <gatorsm...@gmail.com> wrote:
>>>>
>>>>> I would first vote -1.
>>>>>
>>>>> I might find another regression caused by the analysis barrier. Will
>>>>> keep you posted.
>>>>>
>>>>>
>>>

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