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From Dongwon Kim <eastcirc...@gmail.com>
Subject Re: NPE from NullAwareMapIterator in flink-table-runtime-blink
Date Sun, 05 Apr 2020 23:30:27 GMT
Hey Jark,

After he disables checkpointing, the exception seems to disappear.
Hope this information helps.

Best,

Dongwon

On Mon, Apr 6, 2020 at 8:21 AM Dongwon Kim <eastcirclek@gmail.com> wrote:

> Thanks Jark,
>
> I asked to the original questioner, and he answered
> 1) Yes, he seems to turn on checkpointing but doesn't configure anything
> further, which means he is using the Heap statebackend.
> 2) It normally happens 5~10 mins after the job is started.
>
> If this was a bug specific to the Heap statebackend, would it be helpful
> for him to use other statebackends like FS statebackend and RocksDB
> statebackend?
>
> Best,
> Dongwon
>
> On Sun, Apr 5, 2020 at 1:09 PM Jark Wu <imjark@gmail.com> wrote:
>
>> Hi Dongwon,
>>
>> Thanks for reporting this. Let me ask some more questions first.
>> 1) Are you using the Heap statebackend?
>> 2) How often / How long will this exception happen after the job is
>> started?
>>
>> Best,
>> Jark
>>
>> On Sat, 4 Apr 2020 at 21:39, Dongwon Kim <eastcirclek@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> The attached is a stack trace from a member of Korean Flink User Group
>>> about which I have no idea.
>>> [image: 92164295_3052056384855585_3776552648744894464_o.jpg]
>>>
>>> Can anyone give me some hint on this exception?
>>> Thanks,
>>>
>>> Dongwon
>>>
>>

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